Lake Chabot Trail Run

Lake Chabot Trail Run takes place in Castro Valley, California, on November 7, 2026. Six formats share the morning: a 50K, a marathon (26.2 miles), a 30K and a half marathon (13.1 miles) all leaving at 8:30 a.m., an 8K trail race at 8:45 a.m., and a road 5K (3.1 miles) at 9 a.m.

The trail distances run mostly on forest and fire roads, with the half marathon looping past views of Lake Chabot itself. Aid stations provide water, and first aid and radio support cover the course, but runners are encouraged to carry their own nutrition. The 5K is a different animal: rolling hills on mostly paved surfaces, friendly to a first race. For the longer trail options, build with a weekly long run on dirt and practice eating on the move, since your pace will swing with the terrain.