Rolling singletrack and big skies above Castle Rock
Other trail races within 35 miles
A 31-mile loop through Phillip S. Miller Park and Castle Rock's Ridgeline Trail system, the Rock Hawk 50K winds through rolling singletrack with consistent climbing and panoramic views. With 3,325 feet of gain and a 9-hour cutoff, the course is accessible to first-timers yet offers a real challenge. August afternoons bring Colorado's monsoon storms—expect sunshine at the start and potentially rain by midday.
Suitable for first-timers
Castle Rock, CO, United StatesAugust 29, 2026
Well-maintained, non-technical trails
| Location | Mile | Elevation |
|---|---|---|
Start Start | 0.0 | 6,421 ft |
Crossover Aid Station | 1.8 | 6,404 ft |
Clear Sky Aid Station | 5.0 | 6,473 ft |
Clear Sky Aid Station | 9.3 | 6,476 ft |
Crossover Aid Station | 11.4 | 6,404 ft |
Start/Finish Area Aid Station | 15.6 | 6,427 ft |
Crossover Aid Station | 17.4 | 6,404 ft |
Clear Sky Aid Station | 20.6 | 6,476 ft |
Clear Sky Aid Station | 24.9 | 6,476 ft |
Crossover Aid Station | 27.1 | 6,404 ft |
Finish Finish | 31.2 | 6,421 ft |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Late August in Castle Rock brings warm summer days with cool mornings. Race day temperatures typically range from 55–65°F at the 6 AM start, rising to 80–85°F by afternoon. The Denver metro monsoon season peaks in August, with convective thunderstorms common after noon. Runners should prepare for direct sun exposure on open ridge sections and the possibility of rain or lightning by mid-race. The course tops out at 6,635 feet—no alpine exposure, but conditions can change quickly.
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