A Bay Area classic — 62 miles, 13,000 ft, and a Western States qualifier
Other trail races within 127 miles
The Quicksilver Endurance Runs 100K is a 62-mile trail race through Almaden Quicksilver County Park and the adjacent Sierra Azul Open Space Preserve in the hills southwest of San Jose. Starting at 4:30am from the park's historic Hacienda entrance, runners climb 13,000+ feet through the mercury-mining legacy of the Santa Cruz Mountain foothills, including the infamous 'Dog Meat' climb — 1,000 feet in 1.5 miles — and a sweeping descent to Lexington Reservoir. The mix of fire roads and singletrack offers sweeping views of Silicon Valley, Mt. Hamilton, and the Santa Cruz Mountains. All official finishers within the 17-hour limit earn a coveted Western States 100M lottery ticket, making this one of Northern California's most sought-after qualifiers.
Experienced ultrarunners
San Jose, CA, United StatesMay 09, 2026
| Location | Mile | Elevation |
|---|---|---|
Start - Hacienda Start | 0.0 | 482 ft |
Hicks Road - 1 Aid Station | 6.1 | 1,434 ft |
Wood Road - 1 Aid Station | 12.5 | 2,805 ft |
Lexington Aid Station | 17.9 | 728 ft |
Kennedy Road Aid Station | 25.8 | 866 ft |
Wood Road - 2 Aid Station | 31.3 | 2,805 ft |
Hicks Road - 2 Aid Station | 37.8 | 1,434 ft |
Hacienda Aid Station | 41.4 | 482 ft |
Mockingbird Aid Station | 44.5 | 518 ft |
Bull Run - 1 Aid Station | 48.4 | 1,555 ft |
McAbee Aid Station | 54.1 | 384 ft |
Bull Run - 2 Aid Station | 59.0 | 1,555 ft |
Finish - Hacienda Finish | 62.0 | 482 ft |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Afternoon temperatures in May can reach 75-85°F on exposed fire roads and ridgelines in the Santa Cruz Mountains
Pre-dawn temps at the 4:30am start can be in the low 40s°F; coastal fog may persist through mid-morning while afternoons warm significantly
No required gear specified
No recommended gear specified
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