Race. Train. Gear up.
Saturday, September 26, 2026 Castro Valley, CA, USA
Trail 100k

Dick Collins Firetrails 100 km

106 days away
100km Distance
3,000m Elevation
9.5 Grit Score
Elite/Extreme Level
Vertical Intensity 30 D+/km
Flat Hilly Mtn

Moderate undulations. Requires consistent effort across varying grades.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a rolling course. Expect fast, runnable sections where rhythm is key.

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👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

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🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

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Course Intelligence

OPENFREE MAP (LIBRE)

Course Notes

The race will be held at Lake Chabot Marina. The course follows the classic Dick Collins Firetrails course and add and out-and-back along the Nimitz Trail, then down Conlon Trail to intersection of Wildcat Creek Trail and Belgum Trail.