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Mt. Umunhum Marathon

Name: Mt. Umunhum Marathon
Start: 2025-09-20
End: 2025-09-20
Location: San Jose

San Jose, United States • 20 Sep 2025

The Mt. Umunhum Marathon, Race to the Top and Down, is a challenging trail running event held in Almaden Quicksilver County Park, San Jose, California. This marathon features a rugged course that begins at the Hacienda Entrance and ascends to the summit of Mt.

Umunhum, one of the prominent peaks in the South Bay Area. Runners then descend back to the starting point, experiencing the scenic beauty of the park and surrounding hills. The race offers a unique adventure through natural terrain, combining elevation gain with stunning vistas.

It is a full marathon distance and provides race day registration and bib pickup. Visit the organization's website for the most recent information.

United States California San Jose

Race information

Registration

Marathon

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

Trail runs nearby

Saturday May 2

Hacienda Hills Trail Run - Spring

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A full-day trail event at Almaden Quicksilver County Park on May 2, 2026, offering distances from a kids run to a 50K with marked dirt roads, single-track sections, aid stations, drop bag service at the Hacienda start, and free parking.

Saturday May 9

Quicksilver Endurance Runs

San Jose

50 km

100 km

Trail ultramarathons in Almaden Quicksilver County Park on May 9 2026, offering a 100K and a 50K with substantial elevation gain, course maps and GPX files, USATF sanctioning, aid stations, volunteer support, swag and a post race party.

Saturday May 9

Pathways Run 10K

Celebrate the 24th year of this community event in Los Altos Hills. Run or walk through the Westwind Community Barn and Byrne Preserve on hilly 5K, 10K, or 1 mile courses.

Sunday May 10

Trailquake

Trailquake 2026 is a trail event in Saratoga on May 10 offering 5K, 10K and a half marathon through redwoods and pine forest, with local and remote entry options and finisher shirts.