Course
Trail races entirely within Almaden Quicksilver County Park, starting and finishing at the Hacienda entrance. The 100K climbs more than 13,000 feet and starts at 4:30am; the 50K climbs over 6,000 feet and starts at 7:00am. Courses are well marked and supported by several aid stations.
Key dates
- ·RegistrationNot open yet
- ★Race dayMay 2027 · date to be announced
About
The Quicksilver Endurance Runs are 100K and 50K trail ultramarathons in the hills of Almaden Quicksilver County Park, south of San Jose, California. Run by the Quicksilver Running Club since 1982, they are known for steep, exposed climbs on former mercury-mining trails.
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