Trail Running calendar near Redwood City 2025-2026

Rim Rock 50 Mile Trail Challenge is the inaugural ultramarathon in Napa Valley, California, staged at Skyline Wilderness Park. The event offers 50‑mile solo or two‑person relay formats. The course comprises two roughly 26‑mile loops weaving through Skyline Wilderness Park, the Napa Open Space Preser..

The Napa Wilderness Trail Runs, held at Skyline Wilderness Park in Napa, California, offer a variety of trail running distances including 10K, 21K (half marathon), 30K, and a challenging 50K ultra marathon. The courses feature scenic routes with steep climbs, notably the Rim Rock Trail, providing st..

The Wildcat Half Marathon will take place in El Sobrante on Saturday 16 May 2026. You can run between 5 and 13 miles.

The Nitro Trail will take place in San Pablo on Saturday 30 May 2026. You can run between 5 and 13 miles.

The Toro Park Trail Run, held in Salinas, California, offers runners a scenic experience through the iconic Bay Area landscape. Participants can choose from three distances: a 10K, a half marathon (21K), and a full trail marathon. The course features rolling golden hills, smooth trails, and sparse c..