Rim Rock 50 Mile Trail Challenge
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Rim Rock 50 Mile Trail Challenge
The Rim Rock 50 Mile Trail Challenge is a trail ultramarathon held at Skyline Wilderness Park in Napa, California. The course uses park trails, segments of the Napa Open Space Preserve, and the Suscol Headwaters Trail system, and features oak-shaded sections as well as exposed ridgelines and rolling terrain.
Distances:
- 50 mile solo (about 51 miles total across two large loops plus a final loop)
- 25 mile single loop option
The route is organized as roughly two large loops of about 22 miles each, with a shorter final loop of about 10k. The course is subject to modification for trail conditions or access permissions. Multiple aid stations will supply water, electrolyte drinks, gels, fruit, and typical ultra fare. Runners must carry their own reusable cup or hydration system because the event is cupless; aid stations will refill personal containers.
Crew and pacer rules are defined: crew access is limited to specified locations including the Start/Finish area and Lake Marie Aid Station; crew are not permitted at some on-course aid stations. Pacers are allowed only for solo 50 mile runners and only after completing the first loop. Drop bags are placed near the start/finish area and marked with a blue tarp.
Organizers include BayTrailrunners and Trail Squirrel Adventures Team. Camping is available at Skyline Wilderness Park with first come, first served campsite assignment. Visit the organization's website for the most recent information.
