MTNATHLETE

Colorado Races

292 races across 14 disciplines

Upcoming · 83

Trail RunReg Closed

The Grand Traverse

Sep 5, 2026(2d)Crested Butte40M
The Grand Traverse
Road Run

Golden Harvest Half Marathon 5K & 10K - Denver

Sep 5, 2026(2d)Denver1M | 5K | 10K | Half Marathon
Golden Harvest Half Marathon 5K & 10K - Denver
Gravel

Mad Gravel

Sep 5, 2026(2d)Elbert30M | 50M | 85M
Mad Gravel
Road Run

Golden Harvest Half Marathon 5K & 10K - Colorado Springs

Sep 6, 2026(3d)Colorado Springs1M | 5K | 10K | 15K
Golden Harvest Half Marathon 5K & 10K - Colorado Springs
MTBReg Closed

The Grand Traverse

Sep 6, 2026(3d)Crested Butte40M
The Grand Traverse
MTBShort track XC - all levels welcome

Devo Town Series: Factory Trails Short Track @ FLC (Fall)

Sep 9, 2026(6d)Durango
$10
Devo Town Series: Factory Trails Short Track @ FLC (Fall)
Road Bike

Tour of the Moon

Sep 12, 2026(9d)Grand Junction41M | 64M
Tour of the Moon
Trail Run

Devil on the Divide

Sep 12, 2026(9d)Empire22K | 50K
Devil on the Divide
Gravel

Gunni Grinder

Sep 12, 2026(9d)Gunnison30M | 60M | 120M
Gunni Grinder
Triathlon

Lake Nighthorse Triathlon

Sep 12, 2026(9d)DurangoSprint, Olympic
Lake Nighthorse Triathlon
MTB

Grand Enduro

Sep 12, 2026(9d)Grand Junction23M
Grand Enduro
Trail Run

Pikes Peak Challenge

Sep 12, 2026(9d)Manitou Springs2M | 13M | 14+M
Pikes Peak Challenge
Gravel

Rampart Rager

Sep 12, 2026(9d)Colorado Springs50K | 70K | 100K
Rampart Rager
Trail Run

Snow Mountain Ranch Trail Festival

Sep 12, 2026(9d)Granby5K | 10K | Half Marathon | 50K
Snow Mountain Ranch Trail Festival
Road Run

RiNo 5K

Sep 12, 2026(9d)Denver1M | 5K
RiNo 5K
Road Run

National Chocolate Day Run for Chocolates 5K/10K/13.1 - Denver/Aurora

Sep 12, 2026(9d)Centennial1M | 5K | 10K | Half Marathon
National Chocolate Day Run for Chocolates 5K/10K/13.1 - Denver/Aurora
Road Bike

Buffalo Bicycle Classic

Sep 13, 2026(10d)Boulder35M | 50M | 70M | 75M | 100M
Buffalo Bicycle Classic
Road Run

Nun Run

Sep 13, 2026(10d)Centennial1M | 5K
Nun Run
EnduroMulti-stage enduro - intermediate to advanced

Devo Town Series: Star Wars Enduro

Sep 16, 2026(13d)Durango
$10
Devo Town Series: Star Wars Enduro
Trail RunQualifies for Hardrock Hundred🎟️ Lottery

Run Rabbit Run

Sep 18, 2026(15d)Steamboat SpringsHalf Marathon | 50K | 50M | 100M
Run Rabbit Run
Road RunQualifies for BolderBoulder

All-Out Fall Fest

Sep 19, 2026(16d)Westminster5K | 10K | Half Marathon
All-Out Fall Fest
Road Run

Run for Beer - Waldschänke Ciders 5K

Sep 19, 2026(16d)Denver5K
Run for Beer - Waldschänke Ciders 5K
Trail Run

Pikes Peak Marathon + Ascent

Sep 19, 2026(16d)Manitou SpringsHalf Marathon | Marathon
Pikes Peak Marathon + Ascent
Gravel

Salida 76

Sep 19, 2026(16d)Salida76M
Salida 76
MTB

Banana Belt MTB Race

Sep 20, 2026(17d)Salida35M
Banana Belt MTB Race
Road Run

The Golden Gallop

Sep 20, 2026(17d)Golden1M | 5K | 10K | Fun Run
The Golden Gallop
Road Run

Fall Equinox Marathon Half Marathon & 5 Mile

Sep 20, 2026(17d)Fort Collins5M | Half Marathon | Marathon
Fall Equinox Marathon Half Marathon & 5 Mile
Trail Run

Red Feather Trail Jamboree

Sep 25, 2026(22d)Red Feather Lakes35K | 55K | 50M
Red Feather Trail Jamboree
Road Bike

Denver Century Ride

Sep 26, 2026(23d)Denver25M | 50M | 85M | 100M
Denver Century Ride
Road Run

Oktoberfest Run 5K/10K/13.1 - Denver/Aurora

Sep 26, 2026(23d)Centennial1M | 5K | 10K | Half Marathon
Oktoberfest Run 5K/10K/13.1 - Denver/Aurora
GravelQualifies for Unbound🎟️ Lottery

Rad Dirt Fest

Sep 26, 2026(23d)Trinidad25M | 50M | 100M
Rad Dirt Fest
OCR

Tough Mudder - Colorado

Sep 26, 2026(23d)Fort CarsonOCR | Obstacle
Tough Mudder - Colorado
Triathlon

Black Canyon Triathlon

Sep 26, 2026(23d)MontroseSprint
Early bird: $null8d left
Black Canyon Triathlon
MTB

Estes Epic

Sep 26, 2026(23d)Estes Park50K
Estes Epic
Trail Run

Sangre de Cristo Ultras

Sep 26, 2026(23d)Westcliffe27K | 55K | 50M | 100M | 100K | 150M | 200M
Sangre de Cristo Ultras
Road Run

Run for Beer - Prost Brewing Oktoberfest 5K

Sep 26, 2026(23d)Northglenn5K
Run for Beer - Prost Brewing Oktoberfest 5K
Triathlon

Last Call Triathlon

Sep 27, 2026(24d)LovelandSprint, Super Sprint
Last Call Triathlon
Road RunQualifies for Boston Marathon

Boulderthon

Sep 27, 2026(24d)Boulder5K | 10K | Half Marathon | Marathon
Boulderthon
Road Run

Mainly Marathons Center of the Nation Series - Day 2

Sep 29, 2026(26d)Sterling5K | 10K | Half Marathon | Marathon | 50K
Mainly Marathons Center of the Nation Series - Day 2
MTBDownhill - intermediate to advanced

Devo Town Series: Kitty Downhill @ Horse Gulch

Sep 30, 2026(27d)Durango
$10
Devo Town Series: Kitty Downhill @ Horse Gulch
Trail Run

The Bear Chase Trail Races

Oct 3, 2026(30d)Lakewood8K/5M | 15M | 55K | 50M
The Bear Chase Trail Races
Trail Run

Sage Burner Trail Races

Oct 3, 2026(30d)Gunnison10K | 28K | 50K
Sage Burner Trail Races
Triathlon

Splashland Triathlon

Oct 3, 2026(30d)AlamosaSprint
Splashland Triathlon
Trail Run

West Elk Challenge Trail Marathon

Oct 3, 2026(30d)Paonia5K | 10K | Half Marathon | Marathon
West Elk Challenge Trail Marathon
OCR

The Ruff Run

Oct 3, 2026(30d)LovelandOCR | Obstacle
The Ruff Run
Road Run

Colorado Springs Marathon Half 5K and Kids K

Oct 3, 2026(30d)Colorado SpringsKids K | 5K | Half Marathon | Marathon | Relay
Colorado Springs Marathon Half 5K and Kids K
Road Run

Spooky Sprint - Denver

Oct 3, 2026(30d)Littleton1M | 5K | 10K
Spooky Sprint - Denver
Road Run

Windsor Marathon Half Marathon 10K & 5K

Oct 4, 2026(31d)Windsor5K | 10K | Half Marathon | Marathon
Windsor Marathon Half Marathon 10K & 5K
Road RunQualifies for Boston Marathon

Long View Marathon & Half Marathon

Oct 10, 2026(37d)Fort Collins5K | Half Marathon | Marathon
Long View Marathon & Half Marathon
Road Run

Breckenridge Road Marathon

Oct 10, 2026(37d)Breckenridge5K | Half Marathon | Marathon
Breckenridge Road Marathon
Gravel

Grassroots Gravel

Oct 10, 2026(37d)Pueblo15M | 19M| 40M | 75M | 110M
Early bird: $null15d left
Grassroots Gravel
Road Run

Durango Marathon

Oct 11, 2026(38d)DurangoHalf Marathon | Marathon
Durango Marathon
MTBShort track XC season finale - all levels welcome

Devo Town Series: Ska Short Track Season Finale @ Ska World HQ

Oct 14, 2026(41d)Durango
$10
Devo Town Series: Ska Short Track Season Finale @ Ska World HQ
Trail Run

Blue Sky Trail Marathon

Oct 17, 2026(44d)Fort CollinsMarathon
Blue Sky Trail Marathon
Trail Run

Indian Creek Trail Runs

Oct 17, 2026(44d)Sedalia15K | Half Marathon | Marathon | 50M | 125K | 100M
Indian Creek Trail Runs
Road Run

Bobcat Trail Race

Oct 17, 2026(44d)Colorado Springs1M | 5K | 10K | Half Marathon | Marathon | 50K | 100K | 100M
Bobcat Trail Race
Road Run

MonsterDash Run

Oct 24, 2026(51d)Denver5K | 10K
MonsterDash Run
Road Run

Race to Cure Sarcoma - Denver

Oct 24, 2026(51d)Denver1M | 5K
Early bird: $null50d left
Race to Cure Sarcoma - Denver
Trail Run

Narrowleaf Lake Run

Oct 31, 2026(58d)Loveland1M | 5K | Fun Run
Early bird: $null2d left
Narrowleaf Lake Run
Road Run

Spooky Sprint - Colorado Springs

Oct 31, 2026(58d)Colorado Springs1M | 5K | 10K | 15K | Fun Run
Spooky Sprint - Colorado Springs
Road RunQualifies for BolderBoulder

All-Out Kooky-Spooky

Nov 1, 2026(59d)Golden5K | 10K | Half Marathon
All-Out Kooky-Spooky
Trail Run

BINGO! Trail Runs

Nov 7, 2026Byers5K | Fun Run
BINGO! Trail Runs
Trail Run

Bear Run

Nov 7, 2026Colorado Springs5K
Early bird: $null58d left
Bear Run
Road Run

The Great Candy Run

Nov 8, 2026Denver5K
The Great Candy Run
Road Run

Turkey Trails

Nov 8, 2026Colorado Springs5K | 10K | Half Marathon
Turkey Trails
Road Run

Colorado Springs Veterans Day 5K

Nov 8, 2026Colorado Springs5K
Colorado Springs Veterans Day 5K
Road Run

Colorado Cold Rush

Nov 21, 2026Colorado Springs10K | 50K| Half Marathon
Colorado Cold Rush
Road Run

Turkey Trot Prediction Run

Nov 21, 2026Colorado Springs4M | Fun Run
Turkey Trot Prediction Run
Road Run

Mile High United Way Turkey Trot

Nov 26, 2026Denver5K | Fun Run
Early bird: $null59d left
Mile High United Way Turkey Trot
Road Run

Turkey Day 5K

Nov 26, 2026Frisco5K | Fun Run
Early bird: $null82d left
Turkey Day 5K
Road RunQualifies for BolderBoulder

Alpine Bank Boulder Thanksgiving Day

Nov 26, 2026Boulder5K
Alpine Bank Boulder Thanksgiving Day
Road Run

Rock Canyon Half Marathon

Dec 3, 2026PuebloHalf Marathon
Early bird: $null2d left
Rock Canyon Half Marathon
Road RunQualifies for BolderBoulder

ColderBOLDER

Dec 5, 2026Boulder5K
ColderBOLDER
Road Run

All-Out Fa La La

Dec 5, 2026Westminster5K | 10K | Half Marathon
All-Out Fa La La
Road Run

Candy Cane Course

Dec 5, 2026Colorado Springs5K | 10K
Candy Cane Course
Road Run

Chasing Santa 5K

Dec 5, 2026Colorado Springs5K
Early bird: $null92d left
Chasing Santa 5K
Trail Run

Santa Catch 5K & 10K and Kids Fun Run

Dec 12, 2026Windsor5K | 10K | Kids Fun Run
Santa Catch 5K & 10K and Kids Fun Run
Gravel

Old Man Winter Rally

Feb 7, 2027Lyons23M | 40M | 75M
Early bird: $null73d left
Old Man Winter Rally
XC Ski

Frisco Gold Rush

Mar 1, 2027Frisco1K | 5K | 10K | 23K
Frisco Gold Rush
Road RunQualifies for BolderBoulder

Central Park 5k

Mar 28, 2027Denver5K
Central Park 5k
Multisport

Imperial Challenge

Apr 3, 2027Breckenridge10M
Imperial Challenge
Gravel

Desert Gravel

Apr 24, 2027Fruita30M | 50M | 75M | 100M | 125M
Early bird: $null150d left
Desert Gravel
Gravel

Pony Xpress Gravel 160

May 4, 2027Cokedale30M | 50M | 100M
Early bird: $null151d left
Pony Xpress Gravel 160

Past · 207

Road RunReg Closed

Rocky Mountain 5k

Aug 29, 2026Colorado Springs5K
Rocky Mountain 5k
Road RunReg Closed

Run Like the Wind 5K / 2K / Dog Jog

Aug 29, 2026Allenspark2K | 5K
Run Like the Wind 5K / 2K / Dog Jog
TriathlonReg Closed

Boulder Sunset Triathlon

Aug 29, 2026BoulderSprint, Olympic
Boulder Sunset Triathlon
Road RunReg Closed

Run for Hope - Colorado Springs

Aug 29, 2026Colorado Springs5K
Run for Hope - Colorado Springs
Road RunReg Closed

Sloth Run 5K/10K/13.1 - Denver/Aurora

Aug 29, 2026Centennial1M | 5K | 10K | Half Marathon
Sloth Run 5K/10K/13.1 - Denver/Aurora
Trail RunReg Closed

Continental Divide Trail Run

Aug 23, 2026Steamboat Springs5K | 10K | 25K | 50K
Continental Divide Trail Run
MTBReg Closed

Rumble at the Ranch

Aug 23, 2026Highlands Ranch7.6M loop
Rumble at the Ranch
Road RunReg ClosedQualifies for BolderBoulder

Rebel Run 5k

Aug 23, 2026Denver5K
Rebel Run 5k
Road RunReg Closed

Impact Uganda 5K/10K

Aug 22, 2026Centennial5K | 10K
Impact Uganda 5K/10K
Trail RunReg ClosedQualifies for Western States🎟️ Lottery

Leadville Trail 100

Aug 22, 2026Leadville100M
Leadville Trail 100
TriathlonReg Closed

Gunnison Valley Triathlon

Aug 22, 2026GunnisonSprint
Gunnison Valley Triathlon
Trail RunReg Closed

Staunton Rocks! Trail Marathon & Half

Aug 22, 2026Pine4M | Half Marathon | Marathon
Staunton Rocks! Trail Marathon & Half
Trail RunReg Closed

La Garita 200

Aug 19, 2026South Fork200M
La Garita 200
Road BikeReg Closed

Colorado State Criterium Championship

Aug 19, 2026Various
Colorado State Criterium Championship
MTBReg Closed

Highlands Ranch MTB Series - Wildcat Circuit

Aug 19, 2026Highlands Ranch11M
Highlands Ranch MTB Series - Wildcat Circuit
TriathlonReg Closed

Outdoor Divas Triathlon

Aug 16, 2026BoulderSprint, Super Sprint
Outdoor Divas Triathlon
Road RunReg Closed

Sunrise Stampede

Aug 15, 2026Longmont1M | 5K | 10K | Half Marathon | Fun Run
Sunrise Stampede
MTBReg Closed

Farish MTB Race

Aug 15, 2026Woodland Park6M | 12M | 16M
Farish MTB Race
Trail RunReg Closed

The Cheyenne Mountain Run

Aug 15, 2026Colorado Springs5K | 10K | 25K
The Cheyenne Mountain Run
Road RunReg Closed

Run for PB&J 5K/10K/13.1 - Denver/Aurora

Aug 15, 2026Centennial1M | 5K | 10K | Half Marathon
Run for PB&J 5K/10K/13.1 - Denver/Aurora
Trail RunReg ClosedQualifies for Boston Marathon

Boulder Rez Marathon

Aug 15, 2026BoulderHalf Marathon | Marathon
Boulder Rez Marathon
MTBReg Closed🎟️ Lottery

Leadville Trail 100 MTB

Aug 15, 2026Leadville100M
Leadville Trail 100 MTB
Road RunReg Closed

Summer Sizzler - Colorado Springs

Aug 9, 2026Colorado Springs1M | 5K | 10K | 15K
Summer Sizzler - Colorado Springs
MTBReg Closed

Breck Epic

Aug 9, 2026Breckenridge220M
Breck Epic
TriathlonReg Closed

Rocky Mountain Tri-Fest

Aug 9, 2026BoulderSprint, Super Sprint
Rocky Mountain Tri-Fest
Road RunReg ClosedQualifies for BolderBoulder

All-Out Runapalooza

Aug 8, 2026Arvada5K | 10K | Half Marathon
All-Out Runapalooza
Trail RunReg Closed

Reece's Roundup Trail Run

Aug 8, 2026Castle Rock1M | 5K | 10K
Reece's Roundup Trail Run
Road RunReg Closed

Summer Sizzler - Denver

Aug 8, 2026Thornton1M | 5K | 10K | 15K
Summer Sizzler - Denver
Trail RunReg Closed

Lory Summer Trail Series

Aug 4, 2026Fort Collins5K | 10K | 12K
Lory Summer Trail Series
TriathlonReg Closed

Stagecoach Gravel Triathlon

Aug 2, 2026Oak CreekSprint
Stagecoach Gravel Triathlon
Road RunReg Closed

Bound for Boston Marathon & Half Marathon - Denver

Aug 2, 2026Denver10K | Half Marathon | Marathon
Bound for Boston Marathon & Half Marathon - Denver
Road RunReg Closed

Popsicle 5K/10K/Half - Colorado Springs

Aug 1, 2026Colorado Springs1M | 5K | 10K | Half Marathon
Popsicle 5K/10K/Half - Colorado Springs
Road BikeReg Closed

Copper Triangle

Aug 1, 2026Copper Mountain79M
Copper Triangle
Trail RunReg Closed

Aspen Backcountry

Aug 1, 2026Aspen5M | 16M | 50K
Aspen Backcountry
Trail RunReg Closed

Sheep Mountain Ultras

Aug 1, 2026FairplayHalf Marathon | Marathon | 50K
Sheep Mountain Ultras
MTBReg Closed

Highlands Ranch MTB Series - Badlands Circuit

Jul 29, 2026Highlands Ranch11M
Highlands Ranch MTB Series - Badlands Circuit
GravelReg Closed

Bird to Bird Gravel

Jul 26, 2026Crested Butte37M
Bird to Bird Gravel
TriathlonReg Closed

Steamboat Lake Sprint Triathlon

Jul 26, 2026ClarkSprint
Steamboat Lake Sprint Triathlon
EnduroReg Closed

Rip Roaring Femme Mini Enduro

Jul 26, 2026Arapahoe Basin20K
Rip Roaring Femme Mini Enduro
GravelReg Closed

San Juan Gravel Classic

Jul 25, 2026Ridgway22M | 44M
San Juan Gravel Classic
Trail RunReg Closed

Creede 100

Jul 25, 2026Creede50M | 100M
Creede 100
MTBReg Closed

Race Rendezvous

Jul 25, 2026Fraser7.5M | 18M
Race Rendezvous
Road RunReg ClosedQualifies for Boston Marathon

Aspen Valley Marathon

Jul 25, 2026Basalt5K | Half Marathon | Marathon
Aspen Valley Marathon
MTBReg Closed

Audi Snowmass 50

Jul 25, 2026Snowmass Village50M
Audi Snowmass 50
Road BikeReg Closed

Bob Cook Memorial Hill Climb

Jul 25, 2026Idaho Springs27M
Bob Cook Memorial Hill Climb
Trail RunReg Closed

Pikes Peak Ultra

Jul 25, 2026Colorado SpringsHalf Marathon | 50K | 50M
Pikes Peak Ultra
Trail RunReg ClosedQualifies for Western States

Never Summer

Jul 24, 2026Walden60K | 100K
Never Summer
Trail RunReg Closed

Barr Trail Mountain Race

Jul 19, 2026Manitou Springs12.6M
Barr Trail Mountain Race
Trail RunReg Closed

Silverton Alpine Runs

Jul 18, 2026Silverton20K | 30K | 50K | 50M
Silverton Alpine Runs
TriathlonReg Closed

Tri Boulder

Jul 18, 2026BoulderSprint, Olympic, Half Iron
Tri Boulder
Trail RunReg ClosedQualifies for Hardrock Hundred🎟️ Lottery

High Lonesome 100

Jul 17, 2026Buena Vista100M
High Lonesome 100
KayakReg Closed

Royal Gorge Whitewater Festival

Jul 17, 2026Canon City12M
Royal Gorge Whitewater Festival
Trail RunReg Closed

Ouray 100

Jul 17, 2026Ouray50M | 100M
Ouray 100
GravelReg Closed

FoCo Fondo

Jul 16, 2026Fort Collins12M | 32M | 60M | 100M | 118M
FoCo Fondo
MTBReg Closed

Silver Rush 50

Jul 12, 2026Leadville50M
Silver Rush 50
GravelReg Closed

Ned Gravel

Jul 12, 2026Nederland10.5M | 19.3M | 49.3M | 69.5M
Ned Gravel
Road RunReg Closed

Heatwave Half Marathon - Colorado Springs

Jul 12, 2026Colorado Springs1M | 5K | 10K | Half Marathon
Heatwave Half Marathon - Colorado Springs
TriathlonReg Closed

Boulder Peak Triathlon

Jul 12, 2026BoulderSprint, Olympic
Boulder Peak Triathlon
MTBReg Closed

Grin and Bear It

Jul 11, 2026Crested Butte25K
Grin and Bear It
Road BikeReg Closed

Triple Bypass

Jul 11, 2026Evergreen120M
Triple Bypass
Trail RunReg ClosedQualifies for Leadville 100 Run

Silver Rush 50 Run

Jul 11, 2026Leadville50M
Silver Rush 50 Run
Road RunReg ClosedQualifies for BolderBoulder

All-Out Dog Days

Jul 11, 2026Westminster5K | 10K | Half Marathon
All-Out Dog Days
Trail RunReg ClosedQualifies for Hardrock Hundred, Lottery🎟️ Lottery

Hardrock Hundred

Jul 10, 2026Silverton100M
Hardrock Hundred
Trail RunReg Closed

Silverheels

Jul 10, 2026Como10M | 19M | 60K | 100M
Silverheels
MTBReg Closed

Highlands Ranch MTB Series - Rocky Gulch Circuit

Jul 8, 2026Highlands Ranch10M
Highlands Ranch MTB Series - Rocky Gulch Circuit
MTBReg Closed

Firecracker 50

Jul 4, 2026Breckenridge50M
Firecracker 50
MultisportReg Closed

Georgetown SUP-Athlon

Jul 4, 2026Georgetown8.6M
Georgetown SUP-Athlon
MTBReg Closed

Seven Star Circuit Race

Jul 1, 2026Snowmass6.36M | 12.72M
Seven Star Circuit Race
TriathlonReg Closed

Boulder Sunrise Triathlon

Jun 28, 2026BoulderSprint, Olympic
Boulder Sunrise Triathlon
GravelReg Closed🎟️ Lottery

SBT GRVL

Jun 28, 2026Steamboat Springs25M | 53M | 73M | 108M
SBT GRVL
Trail RunReg ClosedQualifies for Leadville 100 Run

Life Time Leadville Trail Marathon

Jun 27, 2026Leadville Half Marathon | Marathon
Life Time Leadville Trail Marathon
Road BikeReg Closed

Aspen Gran Fondo

Jun 27, 2026Aspen36M | 62M | 103M
Aspen Gran Fondo
Trail RunReg Closed

Chase the Moon 12 Hour Endurance Run

Jun 27, 2026Highlands Ranch8M | Marathon | 50K | 12H
Chase the Moon 12 Hour Endurance Run
TriathlonReg Closed

Loveland Lake to Lake Triathlon

Jun 27, 2026LovelandSprint, Olympic
Loveland Lake to Lake Triathlon
GravelReg Closed

Bighorn Gravel

Jun 26, 2026Gypsum20M | 50M | 85M
Bighorn Gravel
MTBReg Closed

Race in the Clouds

Jun 25, 2026Alma13M
Race in the Clouds
Road RunReg Closed

High Line Canal Summer Scamper

Jun 24, 2026Denver5K
High Line Canal Summer Scamper
Road BikeReg Closed

Freedom Tour Classic

Jun 20, 2026Fort Collins25M | 38M | 62M
Freedom Tour Classic
Trail RunReg Closed

Ring the Springs

Jun 20, 2026Colorado Springs50K | 50M
Ring the Springs
Road RunReg ClosedQualifies for BolderBoulder

Red, White, and Brew

Jun 20, 2026Windsor5K | 10K | Half Marathon
Red, White, and Brew
Trail RunReg Closed

San Juan Solstice 50

Jun 20, 2026Lake City50M
San Juan Solstice 50
MTBReg Closed

Wednesday Worlds

Jun 17, 2026Colorado Springs3M | 6M
Wednesday Worlds
EnduroReg Closed

Session Series - Floyd Hill

Jun 17, 2026Idaho Springs
Session Series - Floyd Hill
KayakReg Closed

FIBArk Whitewater Festival

Jun 15, 2026Salida1M | 10M | 14M | 26M
FIBArk Whitewater Festival
Road RunReg Closed

Garden of the Gods 10 Mile Run

Jun 14, 2026Colorado Springs10M
Garden of the Gods 10 Mile Run
Gravel, MTBReg Closed

Pikes Peak APEX Gravel

Jun 13, 2026Colorado Springs15M | 35M | 65M | 135M
Pikes Peak APEX Gravel
MultisportReg Closed

San Juan Trail Tri

Jun 13, 2026Ridgway13M
San Juan Trail Tri
TriathlonReg Closed

Ironman 70.3 Boulder

Jun 13, 2026BoulderFull Iron
Ironman 70.3 Boulder
GravelReg Closed

KowTown Gravel

Jun 13, 2026Kremmling16M | 28M | 54M | 88M
KowTown Gravel
Road RunReg ClosedQualifies for BolderBoulder

All-Out Summer Breeze

Jun 13, 2026Arvada5K | 10K | Half Marathon
All-Out Summer Breeze
MTBReg Closed

The Hundo

Jun 13, 2026Bailey64K | 100K
The Hundo
Road BikeReg Closed

Bike MS Colorado

Jun 13, 2026Greeley36M | 78M | 100M
Bike MS Colorado
MTBReg Closed

Winter Park Classics

Jun 13, 2026Winter Park17.5M | 21M | 25M
Winter Park Classics
Trail RunReg Closed

Barr Lake Trail Race

Jun 13, 2026Brighton35K | 50K | 100K
Barr Lake Trail Race
KayakReg Closed

Taylor Downriver Race

Jun 12, 2026Taylor Park
Taylor Downriver Race
KayakReg Closed

Gunnison River Festival

Jun 12, 2026Gunnison
Gunnison River Festival
Road RunReg ClosedQualifies for Boston Marathon

Steamboat Marathon

Jun 7, 2026Steamboat Springs10K | Half Marathon | Marathon
Steamboat Marathon
TriathlonReg Closed

Colorado Triathlon

Jun 6, 2026BoulderSprint, Olympic
Colorado Triathlon
Trail RunReg Closed

Great Divide Ultra

Jun 6, 2026Divide6K | 18K | 50K
Great Divide Ultra
Road RunReg Closed

Basalt Half Marathon

Jun 6, 2026Basalt13.1M
Basalt Half Marathon
MultisportReg Closed

Valley Bottom Rio Trio

Jun 6, 2026Alamosa12.35M
Valley Bottom Rio Trio
KayakReg Closed

GoPro Mountain Games

Jun 6, 2026Vail4M
GoPro Mountain Games
Trail RunReg Closed

Mace's Hideout

Jun 6, 2026Beulah50M | 100M
Mace's Hideout
Trail RunReg Closed

Ragnar Trail Colorado

Jun 5, 2026Snowmass Village120M
Ragnar Trail Colorado
MTB

Town Challenge MTB Series

Jun 3, 2026Steamboat Springs
Town Challenge MTB Series
Enduro

Session Series - Maryland Mountain

Jun 3, 2026Black Hawk1.8M
Session Series - Maryland Mountain
Gravel

Outlaw Gravel

May 31, 2026Steamboat Springs40M | 66M
Outlaw Gravel
TriathlonReg Closed

Harvest Moon Triathlon

May 31, 2026BoulderSprint, Olympic, Half Iron
Harvest Moon Triathlon
OCRReg Closed

Colorado Springs Spartan Weekend

May 30, 2026Fort Carson3-5M | 10M | 8H
Colorado Springs Spartan Weekend
Kayak

Animas River Days

May 30, 2026Durango300m
Animas River Days
Enduro

Big Mountain Enduro – Granby Ranch

May 30, 2026Granby
Big Mountain Enduro – Granby Ranch
Kayak

Town of Minturn Downriver Dash

May 30, 2026Minturn1.5M
Town of Minturn Downriver Dash
Trail RunReg Closed

North Fork Trail Race

May 30, 2026Buffalo Creek25K | 50K
North Fork Trail Race
MTBEliminator format - all levels welcome

Devo Town Series: Clocktower Eliminator @ FLC (Friday Edition)

May 29, 2026Durango
$10
Devo Town Series: Clocktower Eliminator @ FLC (Friday Edition)
Enduro

Session Series - Virginia Canyon

May 27, 2026Idaho Springs2.6M
Session Series - Virginia Canyon
Road RunReg ClosedQualifies for BolderBoulder

BolderBoulder

May 25, 2026Boulder10K
BolderBoulder
Kayak

Numbers Kayak & Raft Race

May 24, 2026Buena Vista1.25M
Numbers Kayak & Raft Race
Road Bike

Iron Horse Bicycle Classic

May 23, 2026Durango25M | 50M
Iron Horse Bicycle Classic
Kayak

PaddleFest

May 22, 2026Buena Vista
PaddleFest
MTBWomen's XC race - all levels welcome

Devo Town Series: Ladies Only Race @ Twin Buttes

May 20, 2026Durango
$10
Devo Town Series: Ladies Only Race @ Twin Buttes
MTB

Highlands Ranch MTB Series - Highlands Point Circuit

May 20, 2026Highlands Ranch10M
Highlands Ranch MTB Series - Highlands Point Circuit
Road RunReg Closed

Memorial Day Run & March

May 16, 2026Colorado Springs5K | 10K | 30K
Memorial Day Run & March
Road RunReg ClosedQualifies for Boston Marathon

Colfax Marathon

May 16, 2026Denver5K | 10M | Half Marathon | Marathon | Relay
Colfax Marathon
Gravel

Wild Horse Gravel

May 16, 2026Craig20M | 46M | 65M
Wild Horse Gravel
Trail RunReg Closed

Boneyard Boogie 14K & 6K

May 16, 2026Eagle6K | 14K
Boneyard Boogie 14K & 6K
Trail RunReg Closed

Endure 12 Hour 24 Hour and Half Marathon

May 16, 2026DivideHalf Marathon | 12H | 24H
Endure 12 Hour 24 Hour and Half Marathon
Trail RunReg Closed

Ram Party Trail Runs

May 16, 2026Colorado Springs15K | 24K | 50K | 55M | 60K
Ram Party Trail Runs
Road RunReg Closed

Girls on the Run Denver Spring 5K

May 16, 2026Denver5K
Girls on the Run Denver Spring 5K
Road BikeReg Closed

Tour de Victory

May 16, 2026Lafayette20K | 50K | 100K
Tour de Victory
Road BikeReg Closed

Colorado State Time Trial

May 16, 2026Superior7.5M
Colorado State Time Trial
EnduroMulti-stage enduro - intermediate to advanced

Devo Town Series: Mesa Enduro @ Durango Mesa Park

May 13, 2026Durango
$10
Devo Town Series: Mesa Enduro @ Durango Mesa Park
Road RunReg ClosedQualifies for BolderBoulder

Dash & Dine 5K Race 3

May 12, 2026Boulder5K
Dash & Dine 5K Race 3
Road RunReg Closed

Hometown Half Marathon & 5K/10K - Denver

May 10, 2026Littleton5K | 10K | Half Marathon
Hometown Half Marathon & 5K/10K - Denver
Road RunReg Closed

Colorado Women's Classic 10 Miler & 5K/10K

May 10, 2026Westminster5K | 10K | 10M
Colorado Women's Classic 10 Miler & 5K/10K
Road RunReg Closed

Super Mom 5K/10K/Half - Colorado Springs

May 10, 2026Colorado Springs5K | 10K | Half Marathon
Super Mom 5K/10K/Half - Colorado Springs
Road RunReg Closed

Hometown Half Marathon & 5K/10K - Colorado Springs

May 9, 2026Colorado Springs1M | 5K | 10K | Half Marathon
Hometown Half Marathon & 5K/10K - Colorado Springs
Trail RunReg Closed

Quad Rock 50

May 9, 2026Fort Collins25M | 50M
Quad Rock 50
Road RunReg Closed

Colorado Rockies Home Run 5K

May 9, 2026Denver5K | Fun Run
Colorado Rockies Home Run 5K
Trail RunReg Closed

Women's Distance Festival

May 9, 2026Colorado Springs5K
Women's Distance Festival
Road RunReg Closed

Colterris Wine Run 5K

May 9, 2026Palisade5K
Colterris Wine Run 5K
Road RunReg Closed

Run to the Shrine

May 9, 2026Colorado Springs4M
Run to the Shrine
MTB

12 Hours of Mesa Verde

May 9, 2026Cortez16.4M laps
12 Hours of Mesa Verde
Trail RunReg Closed

Valkyrie Trail Race

May 9, 2026Colorado Springs4M | 8M | 30K | Half Marathon | Marathon | 50K
Valkyrie Trail Race
Road RunReg Closed

Mother's Day Run - Boulder Half 10K & 5K

May 9, 2026Louisville5K | 10K | Half Marathon
Mother's Day Run - Boulder Half 10K & 5K
Kayak

Vail Whitewater Race Series

May 6, 2026Vail.5M
Vail Whitewater Race Series
Road RunReg ClosedQualifies for BolderBoulder

Dash & Dine 5K Race 2

May 5, 2026Boulder5K
Dash & Dine 5K Race 2
Road RunReg ClosedQualifies for Boston Marathon

Colorado Marathon

May 3, 2026Fort Collins5K | 10K | Half Marathon | Marathon
Colorado Marathon
Road RunReg Closed

Hayden Cog Run

May 3, 2026Hayden5K | 8.4M
Hayden Cog Run
Road RunReg ClosedQualifies for BolderBoulder

Longmont Half & 5K

May 3, 2026Longmont5K | Half Marathon
Longmont Half & 5K
Trail RunReg Closed

Collegiate Peaks Trail Run

May 3, 2026Buena Vista25M | 50M
Collegiate Peaks Trail Run
Road Bike

Koppenberg Road Race

May 3, 2026Superior22M | 27.5M | 38.5M
Koppenberg Road Race
Road RunReg Closed

Cinco De Mayo Run 5K/10K/13.1 - Denver/Aurora

May 2, 2026Denver5K | 10K | Half Marathon
Cinco De Mayo Run 5K/10K/13.1 - Denver/Aurora
Trail RunReg Closed

Greenland Trail Races

May 2, 2026Larkspur5K | 8K/5M | 25K | 50K
Greenland Trail Races
Road RunReg Closed

High Line Canal Run

May 2, 2026Centennial Fun Run | 1M | 5K
High Line Canal Run
Road RunReg ClosedQualifies for BolderBoulder

Hope House 5K & Fun Run

May 2, 2026Westminster5K
Hope House 5K & Fun Run
Road RunReg Closed

Take 5 in the Garden

May 2, 2026Colorado Springs5K
Take 5 in the Garden
MTB

18 Hours of Fruita

May 2, 2026Fruita7M loop
18 Hours of Fruita
Road RunReg Closed

DU Run Into Spring 5K

May 2, 2026Gunnison3.2M
DU Run Into Spring 5K
Trail RunReg Closed

Duck Waddle 5K

May 2, 2026Estes Park5K | 10K
Duck Waddle 5K
Road RunReg Closed

Walk Run or Roll for Daniel

May 2, 2026Colorado Springs1M | 5K | 10K | Half Marathon | Fun Run
Walk Run or Roll for Daniel
Road RunReg Closed

Colorado Brewery Running Series - Denver Beer Company 50K

May 2, 2026Denver50K
Colorado Brewery Running Series - Denver Beer Company 50K
MTBShort track XC - all levels welcome

Devo Town Series: Factory Trails Short Track @ FLC

Apr 29, 2026Durango
$10
Devo Town Series: Factory Trails Short Track @ FLC
Road RunReg ClosedQualifies for BolderBoulder

Dash & Dine 5K Race 1

Apr 28, 2026Boulder5K | Half Marathon | Marathon
Dash & Dine 5K Race 1
Road RunReg Closed

Blue Heron Half Marathon and 5K

Apr 26, 2026Brighton5K
Blue Heron Half Marathon and 5K
Road Bike

Boulder Roubaix

Apr 26, 2026Boulder29M | 58M | 87M
Boulder Roubaix
Trail RunReg Closed

Unicorn 5K (Denver-East)

Apr 26, 2026Denver5K | Half Marathon
Unicorn 5K (Denver-East)
Road RunReg Closed

Pueblo Chieftain Spring Runoff

Apr 26, 2026Pueblo5K | 10K | 10M
Pueblo Chieftain Spring Runoff
Road Bike

CU Criterium

Apr 25, 2026Boulder
CU Criterium
Enduro

Salida Enduro Series

Apr 25, 2026Salida
Salida Enduro Series
Road Bike

Cobb Lake Road Race

Apr 19, 2026Fort Collins28M - 68M
Cobb Lake Road Race
Road Bike

Oval Criterium

Apr 18, 2026Fort Collins
Oval Criterium
MTBClimb challenge - all levels welcome

Devo Town Series: King/Queen of the Mountain @ Horse Gulch

Apr 15, 2026Durango
$10
Devo Town Series: King/Queen of the Mountain @ Horse Gulch
Kayak

Town Challenge River Race Series

Apr 15, 2026Steamboat Springs2.5M
Town Challenge River Race Series
MultisportReg Closed

Salida 3P

Apr 12, 2026Salida35M
Salida 3P
Road Bike

Front Range Cycling Classic Road Race

Apr 11, 2026Fort Collins13.6M
Front Range Cycling Classic Road Race
Skimo

5 Peaks SkiMo Race

Apr 11, 2026Breckenridge15M
5 Peaks SkiMo Race
Trail RunQualifies for Western States

Desert RATS by UTMB

Apr 8, 2026Fruita10K | 21K | 50K | 100K
Desert RATS by UTMB
Road RunReg Closed

Easter Bunny Hop

Apr 4, 2026Erie5K
Easter Bunny Hop
Road Bike

Squawker Road Classic

Apr 4, 2026Superior30 | 40 | 60 minutes
Squawker Road Classic
Skimo

The Grand Traverse

Mar 29, 2026Crested Butte40M
The Grand Traverse
Road Bike

Maverick Classic Road Race

Mar 28, 2026Grand Junction11M
Maverick Classic Road Race
XC Ski

Vail Nordic Town Series - Maloit Park

Mar 21, 2026Minturn1K | 5K | 10K | 20K
Vail Nordic Town Series - Maloit Park
MTBBeginner-friendly urban scavenger hunt format

Devo Town Series: Alley Cat @ Buckley Park

Mar 11, 2026Durango
$10
Devo Town Series: Alley Cat @ Buckley Park
XC Ski

Snow Mountain Stampede

Mar 7, 2026Snow Mountain Ranch12.5K | 25K | 50K
Snow Mountain Stampede
Skimo

Breck Ascent - Peak 9

Mar 5, 2026Breckenridge
Breck Ascent - Peak 9
SkimoReg Closed

Rise and Grind

Feb 25, 2026Eldora10K
Rise and Grind
Skimo

Audi Power of Four Ski Mountaineering Race

Feb 21, 2026Aspen24M
Audi Power of Four Ski Mountaineering Race
XC Ski

Vail Nordic Town Series - Maloit Park

Feb 16, 2026Minturn1K | 3K | 5K
Vail Nordic Town Series - Maloit Park
Skimo

Gothic Mountain Tour

Feb 15, 2026Crested Butte18M | 23.5M
Gothic Mountain Tour
XC Ski

Sweetheart Skate

Feb 12, 2026Snow Mountain Ranch3K | 15K | 30K
Sweetheart Skate
Skimo

Breck Ascents - Peak 7

Feb 12, 2026Breckenridge
Breck Ascents - Peak 7
NordicReg Closed

Stagecoach Classic

Feb 8, 2026Fraser15K | 30K
Stagecoach Classic
Nordic

Ski for Sisu

Feb 8, 2026Carbondale3.5K | 10K | 12.5K
Ski for Sisu
XC Ski

Alley Loop Nordic Marathon

Jan 31, 2026Crested Butte5K | 10K | 21K | 42K
Alley Loop Nordic Marathon
XC Ski

Governor’s Cup

Jan 25, 2026Devil's Thumb Ranch15K | 30K
Governor’s Cup
Skimo

Mt. Werner Madness

Jan 21, 2026Steamboat Springs5M
Mt. Werner Madness
Nordic

Owl Creek Chase

Jan 18, 2026Snowmass15K | 25K
Owl Creek Chase
XC Ski

Vail Nordic Town Series - Vail Nordic Center

Jan 14, 2026Vail1K | 3K | 5K
Vail Nordic Town Series - Vail Nordic Center
Skimo

Frisco Skimo Sprint

Jan 13, 2026Frisco
Frisco Skimo Sprint
Skimo

Uphill & Skimo Race

Jan 11, 2026Beaver Creek6.1K
Uphill & Skimo Race
XC Ski

Grand County Nordic Race Series

Jan 10, 2026Grand County7.5K | 15K | 25K | 30K | 50K
Grand County Nordic Race Series
XC Ski

Granby Ranch Skate Race

Jan 10, 2026Granby7.5K | 15K
Granby Ranch Skate Race
Skimo

Breck Ascent - Peak 8

Jan 8, 2026Breckenridge
Breck Ascent - Peak 8
XC Ski

Vail Nordic Town Series - Vail Nordic Center

Dec 23, 2025Vail1K | 3K | 5K
Vail Nordic Town Series - Vail Nordic Center
Skimo

El Lobo Loco

Dec 13, 2025Wolf Creek
El Lobo Loco
Skimo

Howelsen Hill Circuit

Dec 11, 2025Steamboat Springs
Howelsen Hill Circuit
Skimo

Rise & Shine Series

Nov 4, 2025Arapahoe Basin1M
Rise & Shine Series