15 miles of rolling Colorado singletrack
Other trail races within 35 miles
A 15.6-mile loop through the heart of Phillip S. Miller Park's singletrack network, the Rock Hawk 25K delivers 1,667 feet of gain over scenic, rolling terrain with open ridge views. One of the best-value trail races in the Denver metro area, it serves as an excellent entry point to trail running with an 8-hour cutoff and two well-stocked aid stations.
Castle Rock, CO, United StatesAugust 29, 2026
| Location | Mile | Elevation |
|---|---|---|
Start Start | 0.0 | 6,421 ft |
Crossover (outbound) Aid Station | 1.8 | 6,401 ft |
Clear Sky Aid Station | 5.0 | 6,473 ft |
Clear Sky (return) Aid Station | 9.3 | 6,473 ft |
Crossover (return) Aid Station | 11.4 | 6,404 ft |
Finish Finish | 15.6 | 6,421 ft |
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Late August in Castle Rock brings warm summer days with cool mornings. Race day temperatures typically range from 57–65°F at the 7 AM start, rising to the low 80s by the time finishers are on course. Afternoon convective thunderstorms are common in Colorado's monsoon season—expect clear skies early but be prepared for rain or lightning by late morning. Direct sun on open ridge sections makes sunscreen and hydration essential.
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