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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

Fri - Mon Jun 26-29

The Rock The Loch Half Marathon

Live and virtual options at Lake Chabot feature 5K, 10K, and a half marathon with multiple aid stations, on-course nutrition, race apparel and a woodallion, post-race beverages, and a brewfest atmosphere.

Friday Jul 3

Independence Day Dash 5K - Livermore

Livermore

400 m

5 km

A community Independence Day event at Sycamore Grove Park featuring a flat 5K on mixed paved and dirt trails and a 400 meter kids run for ages 10 and under. T shirts are included with race fees.

Saturday Jul 4

Rancho Hills Trail Run - Summer

...

A multi-distance trail event at Rancho Cañada del Oro Open Space Preserve on July 4, 2026, with routes from 5K to 50K over hilly single track and dirt roads. Two fully stocked aid stations support runners and time limits range from 1 to 9 h..

Saturday Jul 11

San Lorenzo River Trail Run

...

Experience a scenic trail run through ancient Coastal Redwoods and lush river canyons in Santa Cruz. Choose from multiple distances including a 50K and marathon with several river crossings.