BestRacestrail · 250k · 100-mile-run · 100k · 50-mile-run · 50k · marathon · half · 10k · 5k · kids-run
Colorado River Run 250K • 100 Mile • 100K • 50 Mile • 50K • Marathon • Half Marathon & Ruck • 10K • 5K • Kids 1K
Build your free race-day pace plan| Distances | 250k, 100-mile-run, 100k, 50-mile-run, 50k, marathon, half, 10k, 5k, kids-run |
| Surface | trail |
| USATF certified | N/A (trail) |
| Boston qualifier | No |
Running Colorado River Run 250K • 100 Mile • 100K • 50 Mile • 50K • Marathon • Half Marathon & Ruck • 10K • 5K • Kids 1K for a cause? Set up a free team page — rally your people, point donations straight to your charity.
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Preset to race weekend, Nov 26 – 28.
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Race Pace Analyzer beta
Build your Colorado River Run 250K • 100 Mile • 100K • 50 Mile • 50K • Marathon • Half Marathon & Ruck • 10K • 5K • Kids 1K splits
Not a generic pace calculator — this one already knows the course. Give it your goal finish time and it returns every split to the tape, adjusted for this race's terrain and typical race-morning heat, plus a fueling plan and an honest read on whether the goal fits your fitness. Free, no signup, nothing held back.
- Already loaded
- 8 distances
- Trail underfoot
- ≈48°F on November race mornings
| Mile | Split | Elapsed |
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Training paces for this goal
The everyday paces that build the fitness behind your goal — derived from your target with the Daniels VDOT model. Bookmark these for your next training block.
Guides, not gospel — run easy days by feel and adjust for heat, hills, and how your legs actually feel that day.
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Beta: splits are exact math on your goal time; terrain and weather notes are estimates from this race's listed data, not a forecast. Pacing is a plan, not a promise.