Reservoir Dogs Trail Race

Reservoir Dogs Trail Race is held in Orinda, California, on October 10, 2026, organized by Inside Trail. Four formats are on offer: a 35K (about 21.7 miles) and a half marathon (13.1 miles) starting at 8:00 a.m., a 10K at 8:30 a.m. and a 5K at 8:45 a.m., all on the trails of the East Bay hills.

East Bay trails are classic California singletrack and fire road, with grassy climbs and fast descents that reward runners who are comfortable on hills. The 35K is a nice bridge between a trail half marathon and a first 50K, long enough to require fueling but short enough to finish by lunchtime. The half marathon is an honest test for road runners moving to trails, and the 10K and 5K work as introductions for beginners or as a fast effort for experienced runners. Give the 35K a 14-week build with long runs of 18 to 20 miles on hilly ground and weekly hill repeats; the shorter distances need 8 to 12 weeks of consistent running. Mornings in October are often cool but the exposed ridges heat up quickly, so carry water even on the shorter courses.