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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

42 km

Marathon

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

Trail runs nearby

Saturday Nov 8

Mermaid Trail Run - Woodside

Woodside - 21 mi from San Jose

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Enjoy scenic redwood trails at Huddart Park with distances from 3 Mile to Half Marathon, plus a family Mermaid Dash for kids. Try the festive 6 Hour Challenge to see how many 3 Mile loops you can cover, or join virtually.

Saturday Nov 8

Lake Chabot Trail Run

Castro Valley - 26 mi from San Jose

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Tackle scenic rolling trails around Lake Chabot with distances from 8K to 50K and a free kids dash. Well marked loops, stocked aid stations and a cupless policy make this a rewarding challenge for trail runners of all levels.

Saturday Nov 8

Rancho Hills Trail Run - Fall

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Take on the rolling, scenic trails of Rancho Cañada del Oro in Morgan Hill with distances from 5K to 50K. Expect challenging hills, mixed singletrack and fire road, creek crossings and big views framed by old oaks for a true trail running a..

Thursday Nov 27

Zoom Turkey Trot

Celebrate Thanksgiving at the Zoom Turkey Trot in San Jose at Hellyer Park with a USATF certified half, 10K, 5K and kids runs, plus t shirts and finisher medals. Flat, fast courses and stocked aid stations welcome all abilities.

Saturday Nov 29

Quarry Turkey Half Marathon

Fremont - 15 mi from San Jose

Join the Quarry Turkey at Quarry Lakes on November 29 for a fast, mostly flat trail 5K, 10K or half marathon with a free kids sprint and family friendly Thanksgiving costumes encouraged. Proceeds benefit Alameda County Community Food Bank.

Saturday Dec 6

Calero Trail Run - Winter

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Tackle scenic singletrack and dirt at Calero County Park in the Calero Trail Run Winter, with distances from a kids mile to a 50K. Expect rolling hills, oak vistas, aid stations, a finishers medal and race day registration.