The Big Alta
Marinwood, CA
50K
Quicksilver Endurance Runs
In 188 days
About this race
The 50K and 100K races are run on scenic, hilly single track trails and fire roads through peaceful oak forests, wide-open meadows, and along ridges with spectacular views of the Santa Clara Valley and the Santa Cruz Mountains.
Key dates
Registration opens
Nov 14, 2026
Race day
May 8, 2027
Email me updates about Quicksilver Endurance Runs
Registration openings and major changes, like a new date or a cancellation.
Entry transfers
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- Mar 19, 2027
- Mar 13, 2027
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Listed from UltraSignup. Checked Nov 1, 2026.