Ultra Races in Colorado
57 upcoming ultra races in Colorado
Masters Race (Ages 40+)Youth Race (Ages 17 and under)The City Park Circuit
Triple CrownSkiRunBikeDual Sport
2-Mile - 20 years & older2-Mile - 13 to 19 years800m - 12 & under800m - 13 to 19 years800m - 20 years & older1500m - 12 & under1500m - 13 to 19 years1500m - 20 years & older1500m & 2-Mile - 20 years & older800m, 1500m & 2-Mile - 20 years & older800m & 2-Mile - 20 years & older800m & 1500m - 20 years & older800m, 1500 & 2-Mile - 13 to 19 years1500m & 2-Mile - 13 to 19 years800m & 2-Mile - 13 to 19 years800m & 1500m - 13 to 19 years800m & 1500m - 12 & under
50 Mile (Relay)50 Mile (Individual)100 Mile (Individual)100 Mile (Relay)
1 Mile5K10KKid's DashVolunteer then RunHalf MarathonVirtual Race
Fairmount 5K RunAll Access Pass (includes 5k Run or Walk, Ninja course & Fun Run)Fairmount 5k WalkVirtual 5k Run/WalkFairmount Flash (Fun Run)Fairmount Flash (Fun Run) & Ninja Course (ages 5+)Ninja Course (ages 5+)
1 Mile5K10KKid's DashVolunteer Then RunHalf MarathonVirtual Race
Half MarathonMarathon50K Ultra MarathonVirtual Full MarathonVirtual 50KVirtual Half Marathon
5k1/2 Mile(ish) Saunter
4M Trail Races8M Trail Race25K Trail RaceVirtual RaceVirtual 50K50K Trail Race
1-Mile - 20 years & older1-Mile - 12 & under1-Mile - 13 to 19 years800m - 20 years & older800m - 13 to 19 years800m - 12 & under5,000m - 13 to 19 years5,000m - 20 years & older800m & 1-Mile - 13 to 19 years800m & 1-Mile - 12 & Under800m, 1-Mile & 5,000m - 20 years & older1-Mile & 5,000 - 20 years & older800m & 5,000m - 20 years & older800m & 1-Mile - 20 years & older800m, 1-Mile & 5,000m - 13 to 19 years1-Mile & 5,000m - 13 to 19 years800m & 5,000m - 13 to 19 years
Quad Rock 25Quad Rock 50
1 Mile5kVirtual Run10kHalf MarathonKid's DashVolunteer Then Run
1 Mile5k10kHalf MarathonKid's DashVirtual RunVolunteer then Run
5k10 Miler10k
Miles for Smiles 5KMiles for Smiles 5K - Virtual RaceJordyn's Adaptive Dash - open to children who have received adaptive equipment from Two Angels Foundation
7k walk or run (4.3 miles)7K Ruck (4.3 Miles)14 MileFull Marathon50 Miles50k50 Mile Relay: 2-9 runners100K Relay: 2-12 runners100K100 Mile Relay: 2-12 runners100 Mile36 Hour Timed Event36 Hour Virtual Race
Short CourseLong Course
KTG Cow DogKTG The CalfKTG Calf E bikeKTG The CowKTG Cow E BikeKTG The Bull
5K Walk15 Mile25 Mile w/T-shirt25 Mile w/Jersey38 Mile62 Mile
Red, White, and WARRIOR 5KLittle Sparkler Sprint
5k10k
5k Run/Walk
10-Mile19-Mile60k50-Mile100k100-Mile
Double BypassTriple Bypass
1 Mile5 K10 KHalf-Marathon RelayHalf-MarathonKids DashVirtual RaceVolunteer Then Run
1 Mile5 K10 KHalf-Marathon RelayHalf-MarathonKids DashVolunteer Then RunVirtual Race
100 Miler
Never Summer 60kmNever Summer 100kmThe Double (60km & 100km)
25 Mile Solo Racer (1 Lap)50 Mile Solo Racer (2 laps)50 Mile Team of 2 (2 laps)
5K Run/Walk
Wild West Relay - Get Your Ass Over the Pass - 12 person team (7-12 runners)Wild West Relay - Get Your Ass Over the Pass - High School TeamWild West Relay - Get Your Ass Over the Pass - Super Ultra team (1-3 runners)Wild West Relay - Get Your Ass Over the Pass - Ultra team (4-6 runners)
Half Marathon50k50-Mile
1 Mile5k10kKids Dash15KVirtual RaceVolunteer and Run
1 Mile5k10k15KKids DashVolunteer then RunVirtual Race
2026 CKF Leadville Trail 100 MTB - Extended With House2026 CKF Leadville Trail 100 MTB - Extended No House
5 Mile16 Mile50K
1 Mile5k10kHalf MarathonKid's DashVolunteer then RunVirtual Run
1 Mile5k10kHalf MarathonKid's DashVirtual RunVolunteer then Run
Flaming Foliage Relay - Ultra Team (4-5 Runners)Flaming Foliage Relay - 10 person Team (6-10 runners)Flaming Foliage Relay - Super Ultra (1-3 runners)
Sprint Relay - CoedIndividual SprintSprint Relay - MaleSprint Relay - FemaleIndividual Olympic
5kFREE Kids Fun Run
Banana Belt - 35 MilesBanquet - 76 MilesLite - 76KMThe Double LiteThe Double Banquet
Red Feather Trail Jamboree Half MarathonRed Feather Trail Jamboree 50 MileRed Feather Trail Jamboree 50kmRed Feather Trail Jamboree 3-Day Challenge
50k30k
Heavy Half Marathon50k Bike50k RunThe Epic
Norwood to GatewayTelluride to GatewayRidgway to Gateway
8-Mile27k50-Mile50k100k100-Mile
50k