Rim Rock 50 Mile Trail Challenge
Always double-check with the organizer's website! This page may contain affiliate links.
Rim Rock 50 Mile Trail Challenge
The Rim Rock 50 Mile Trail Challenge takes place May 15, 2027 in Napa, California, organized by BayTrailrunners. The event uses Skyline Wilderness Park and nearby open space preserves, including the Suscol Headwaters trail system.
Distances:
- 50 mile solo course (about 51 miles total, two large loops plus a final shorter loop)
- 25 mile one loop option (approximately one large loop)
Course and terrain: The route consists of roughly 2.5 loops that travel Skyline Wilderness Park, Napa Open Space Preserve, and the Suscol Headwaters trails. Terrain includes oak-shaded singletrack, exposed ridgelines, sustained climbs, and varied trail surfaces. About half the course is shaded and half is exposed. The published route is an estimate and may change due to trail conditions or access.
Logistics: A designated drop bag area is located near the start/finish (look for a blue tarp). Crew access is allowed at the start/finish area and at the Lake Marie aid station; crew access is not permitted at certain aid stations in the Napa Road and Suscol Headwaters areas. Pacers are permitted only for solo 50 mile runners after the first loop and are not allowed for relay teams. Runners must carry their own reusable cup or hydration system because the race is cupless; aid stations will refill personal containers.
On-course support: Major aid stations will offer hydration, electrolyte products, gels, fruit, and standard ultra race foods. Registered runners receive a dry wick collared shirt; finishers receive a race hat. Entry fees are non-refundable and non-transferable; credit policies apply in specified notice windows and event cancellations for extreme conditions may result in rescheduling or partial credit. Visit the organization's website for the most recent information.
