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Mt Umunhum Ultras

Name: Mt Umunhum Ultras
Start: 2025-06-07
End: 2025-06-07
Location: Gold Creek

Gold Creek, United States • 7 Jun 2025

The Mt Umunhum Ultras is a challenging trail running event held in San Jose, California, featuring multiple race distances including 50K, Trail Marathon, 30K, Half Marathon, 9 Mile, 10K, and 5K. The course traverses the scenic Santa Clara Valley, Sierra Azul Open Space Preserve, and Santa Cruz Mountains, offering over 15,000 feet of elevation gain through oak forests, meadows, and steep climbs. The event emphasizes a rugged, adventurous atmosphere suitable for experienced trail runners.

Courses are well-marked with aid stations and all finishers receive commemorative medals. The 52-mile race is not offered in 2025 but may return in 2026. Registration and bib pick-up occur on race day. Visit the organization's website for the most recent information.

United States California Gold Creek

Race information

Website Registration

50 km

50k

26 mi

Trail Marathon

30 km

30k

13 mi

Half Marathon

9 mi

9 Mile

10 km

10k

5 km

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday Mar 7

Skyline Ridge Trail Run

Explore the Santa Cruz Mountains on this trail run fundraiser. Choose from 10K, 21K, or 50K distances through scenic ridge preserves. Your entry fully supports the Bay Area Ridge Trail.

Saturday Mar 7

Terrible, Horrible, No Good, Very Bad Day 50K

General Information The Terrible, Horrible, No Good, Very Bad Day is an unofficial, non-organized trail run on March 7, 2026. It offers three distance options: 50K (32 miles) with approximately 10,900 feet of elevation gain. 18 Miler (30K)..

Sunday Mar 22

Horseshoe Lake Half Marathon

La Honda

Half Marathon

Run through the Skyline Ridge Open Space Preserve on a scenic course featuring coastal views and gentle hills. All proceeds and matched entry fees support medical aid programs via The Hatuey Project.

Saturday Mar 28

Western Pacific Marathon

Run a flat and fast course on the historic Western Pacific Trail in Fremont. Choose from a half marathon, 10K, or 5K starting at Quarry Lakes. The event is open to runners and walkers of all levels.