The Big Alta
MAR
20-22
2026
The Big Alta is a scenic trail running weekend in Marin County, California. It offers three challenging distances: a 100K point to point, a 50K loop, and a 28K loop, all summiting high points for vast Bay Area views.
20-22 Mar 2026
100 kilometers
50 kilometers
28 kilometers
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Event Information
The Big Alta is a trail running event in Marin County, California, organized by Freetrail and Daybreak Racing.
The event offers three race distances:
- 100K, a point-to-point course
- 50K, a single-loop course
- 28K, a single-loop course
All three courses are designed to be scenic and summit many of the highest points in Marin County, providing views of the San Francisco Bay Area. The event includes support and a finish line celebration.
Location
The race starts at the Marinwood Community Center in Marinwood, California.
Schedule
The event takes place from March 20 to March 22, 2026. The 50K starts on Friday, the 100K on Saturday, and the 28K on Sunday. Visit the organization's website for the most recent information.
100 km
100k
50 km
50k
28 km
28k
