A trail ultramarathon at Skyline Wilderness Park on May 15, 2027, featuring a solo ~51-mile 2.5-loop course and a one-loop ~25-mile option. Cupless aid stations, specified crew and pacer rules, drop bag service, on-course nutrition, and pos..

Sunday May 16

Mud Factor - Sacramento

Elk Grove - 70 mi from Lucas Valley-Marinwood

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Mud Run / Obstacle Run

5 km

A 5K mud and obstacle run at Mahon Ranch in Elk Grove on May 16, 2027, with adult and KIDZ family waves, required signed waivers and photo ID for adults, spectator festival access, and on-site event photography.

Saturday May 22

Run for Amma

Los Gatos - 65 mi from Lucas Valley-Marinwood

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10 km

30 km

50 km

A charity trail event at Skyline Ridge Open Space Preserve in Los Gatos offering 50K, 30K and 10K courses, with 100% of registration proceeds donated to a UCSF cancer research lab.

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