Quicksilver Endurance Runs

San Jose, United States • 9 May 2026

Quicksilver Endurance Runs

The 2026 Quicksilver Endurance Runs are scheduled for Saturday, May 9, 2026 and are organized by the Quicksilver Running Club of San Jose. The event takes place on trails associated with Almaden Quicksilver County Park and includes aid stations, course maps, GPX files, and turn-by-turn directions for competitors.

Distances offered:

  • 100K - 62 miles, 13,000+ feet elevation gain, 17 hour time limit
  • 50K - 30.3 miles, 6,000+ feet elevation gain, cutoff at mile 22

The 100K is USATF sanctioned as part of the Pacific Mountain Ultra-Trail Grand Prix and official finishers of the 100K within the 17 hour limit qualify for the Western States 100 lottery. The event provides swag and a post-race party. Volunteer positions are organized so volunteers can select preferred times and locations and receive additional information through the registration system or email. The organizing club operates as a nonprofit and has donated funds to various organizations from past races. Visit the organization's website for the most recent information.

Race information

100 km
100k
50 km
50k
Visit the organization's website for the most recent information.
Trail runs nearby

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.

A free in-person trail run hosted by Fleet Feet Aptos and Altra near Nisene Marks, with demo shoes available and beer at Other Brother Beer Aptos. The event features a group trail run and is scheduled to last two hours.

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.

Multiple trail distances from 5K to 50K on very hilly single track and dirt roads at Rancho Cañada del Oro. The course features scenic foothill views, two aid stations, enforced cutoffs, and finishers receive a medal.

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