Rim Rock 50 Mile Trail Challenge
Napa, United States • 16 May 2026
Event details
The Rim Rock 50 Mile Trail Challenge is scheduled for May 16, 2026 in Napa, California at Skyline Wilderness Park (2201 Imola Avenue). Distances offered include:
- 50 mile solo
- 50 mile relay (two-person teams)
The event includes camping on May 15–17 at Skyline Wilderness Park. There is a $6 vehicle entrance fee for Skyline Park event access.
Course and logistics
The course uses rugged trail segments in Skyline Wilderness Park, the Napa Open Space Preserve, and the Suscol Headwaters Trail system. The route is described as two loops of approximately 26 miles each; solo runners are set to complete both loops while two-person relay teams each complete one loop. A 13-hour total course cutoff is listed; relay team members have 6.5 hours to finish their section.
Four aid stations will supply food, fruit, and hydration. The event is cupless: runners must bring reusable cups, bottles, or hydration packs; aid stations will refill personal containers. Drop bags are allowed near the start/finish area and at Lake Marie Aid Station. Crew access is permitted at the Start/Finish area and at Lake Marie Aid Station only; crew are not allowed at the Napa Road or Suscol Headwaters aid stations. Pacers are permitted only for solo runners on the final 25-mile loop and are not permitted for relay teams. Course routing and aid station placement may be adjusted before race day. Visit the organization's website for the most recent information.