⏵ State guide · 19 races
Trail Races in Colorado: The 19 Races Worth Training For
Colorado racing means altitude first, terrain second. Courses regularly run above 10,000 feet through the San Juans, the Sawatch Range, and the Front Range, with thin air and big vert deciding more races than technical footing does. Hardrock and Leadville are the household names, but the state is full of quieter high-mountain 50s and 100s built on the same math.
Every Colorado race guide
- TransRockies Run: Pass to PubLeadville · Jul 202651M / 35M (3-day stage)
- Leadville Trail 100 RunLeadville · Aug 2026100M
- Telluride Mountain RunTelluride · Aug 202665M / 40M / 24M / 14M
- Sheep Mountain Trail RunsFairplay · Aug 202650M / 50K / Half
- Rio Grande 100South Fork · Aug 2026100M
- Run Rabbit RunSteamboat Springs · Sep 2026100M / 50M
- Sangre de Cristo Trail FestivalWestcliffe · Sep 2026100M / 100K / 50M / 50K / 27K / 8M
- The Bear ChaseLakewood · Oct 2026100K / 50M / 50K
- Indian Creek FiftiesSedalia · Oct 202650M / 55K / 15M / 5M
- Quad Rock 50Fort Collins · May 202750M / 25M
- San Juan Solstice 50 Mile RunLake City · Jun 202750M
- Mace's Hideout 100Beulah · Jun 2027100M / 50M
- Hardrock Hundred Mile Endurance RunSilverton · Jul 2027100M
- High Lonesome 100Salida · Jul 2027100M
- Ouray 100 Mile Endurance RunOuray · Jul 2027100M / 50M
- Never Summer 100KGould · Jul 2027100K / 60K
- Silverton Alpine Marathon & 50KSilverton · Jul 202750K / Marathon / 8M
- Pikes Peak UltraColorado Springs · Jul 202750M / 50K / 30K / 20K
- Creede 50 & 100Creede · Jul 2027100M / 50M
⏵ Train for a Colorado race
Summit Line turns your goal race into a plan built around your actual fitness: a fitness-aware training schedule, an hour-by-hour fueling sheet, and a course-aware finish projection, all built around the race you pick.
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