Trail Running calendar near Lucas Valley-Marinwood 2025-2026

Skyline 50K is one of the oldest 50K ultras in the US, offering a scenic loop through East Bay Regional Parks from Lake Chabot Marina. First time ultrarunners and half marathoners are welcome, and the day ends with plant based post race foo..

Run the Redwood Summer Trail Run in Oakland on August 15, 2026, with distances from a kids dash to a rugged 50K through scenic Redwood Regional Park. Pre registered runners get a tee and all finishers receive a custom medal.

Run classic Bay Area trails at the 43rd Dick Collins Firetrails on September 26, 2026 at Lake Chabot Marina, with 100k, 50 mile and marathon distances and UTMB Index status. The 50 mile is also part of the Pacific USATF Grand Prix for added..

Join the 39th Ruth Anderson Memorial Endurance Run in San Francisco on October 10, 2026. Run scenic loops around Lake Merced on a certified course with 50k and 50 mile options and aid stations for a memorable autumn ultramarathon.