Quicksilver Endurance Runs

MAY
9
2026
Test your endurance at Almaden Quicksilver County Park with 50 km or 100 km trail races. These USATF sanctioned events offer significant elevation gain and the 100 km distance serves as a Western States 100 qualifier.
Sat 9 May 2026
100 kilometers 50 kilometers

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Quicksilver Endurance Runs

The Quicksilver Endurance Runs are trail running events held in the Almaden Quicksilver County Park. These runs are sanctioned by USA Track & Field and contribute to the USATF Pacific Mountain-Ultra-Trail Grand Prix. The event features two distinct distances:

  • 100 km: This course covers 62 miles with more than 13,000 feet of elevation gain.
  • 50 km: This course covers 30.3 miles with more than 6,000 feet of elevation gain.

Participants in the 100 km event start at the Hacienda entrance of the park and must carry a light source for the early stages of the race. The event provides a collection box at the Wood Road aid station for runners to drop off headlamps, which are then transported to the finish area. Finishing the 100 km distance within the 17-hour time limit serves as a qualifying achievement for the Western States 100 lottery.

The event includes aid stations and course cutoff times to manage participant progress. Runners receive swag and are invited to a post-race party. The organization behind the event is a non-profit club that has donated proceeds to various charities and local organizations. Access to digital course maps, GPX files, and turn-by-turn directions is available for both distances to assist with navigation through the park trails. Visit the organization's website for the most recent information.

100 km
100k
50 km
50k
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