Sky Rim Duathlon
Running Races in Colorado
340 upcoming races
Browse by City
Denver 43 Centennial 37 Colorado Springs 36 Fort Collins 24 Littleton 15 Arvada 12 Steamboat Springs 12 Westminster 10 Loveland 10 Durango 9 Buena Vista 8 Aurora 8 Aspen 8 Boulder 7 Golden 7 Thornton 7 Parker 6 Bellvue 6 Pueblo 5 Longmont 5 Windsor 5 Highlands Ranch 5 Louisville 5 Manitou Springs 4 Grand Junction 4 Brighton 4 Salida 4 Castle Rock 4 Estes Park 3 Frederick 3
Upcoming Races in Colorado
Earth Day 5K
Half Marathon
1 Mile5K10KKid's DashVolunteer Then RunVirtual RaceHalf Marathon
Fairmount 5K RunFairmount 5k WalkVirtual 5k Run/WalkAll Access Pass (includes 5k Run or Walk, Ninja course & Fun Run)Fairmount Flash (Fun Run)Fairmount Flash (Fun Run) & Ninja Course (ages 5+)Ninja Course (ages 5+)
Run Wild! Rabies Free Africa 5K
Family 1 Mile Fun Run5K RegistrationVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt)10K Registration13.1 Half-Marathon Registration
Manion WOD Workout
Half MarathonMarathon50K Ultra MarathonVirtual Half MarathonVirtual Full MarathonVirtual 50K
Family Fun Run 1 Mile5K RegistrationVirtual Run Registration (5K/10K/13.1)5K/10K/13.1 Eco-Registration (No Shirt)10K Registration13.1 Half-Marathon Registration
5K (Adult 13 and up)5K (Child 6-12)5K (Child 5 and Under)
Strut for Mutts 2026
Manion WOD Workout
SOAR 5K RunSOAR 5K Walk
5K Run/WalkHalf Marathon
2026 Flying Pig 5K
Manion WOD WorkoutManion WOD Ruck Workout
5K Run10K Run10M Run
50-yard dash1.2-mile run (grades 4-8)1.2-mile run (grades 3 & under)
5kHalf-Marathon