Mt. Tam Trail Run

Stinson Beach, United States • 8 Nov 2025

Mt. Tam Trail Run, staged by Inside Trail Racing, starts in Stinson Beach, California, at Mt. Tamalpais State Park.

Runners tackle four distances—50K, 30K, half marathon, and 10K—on technical dirt trails and non-technical fire roads with steep climbs and stunning coastal views. Elevation gain ranges from 1,600 ft (10K) to 6,000 ft (50K). The route ascends Mt.

Tam for panoramic views, traverses the Headlands, and finishes back at the beach with post-race food. The race is cupless, uses robust aid stations, offers a $300/$200/$100 prize purse for 50K, and honors finishers with medals. Capacity is 500.

It sells out early. Visit the organization's website for the most recent information.

Race information

30 mi
6000 m+
50k (30.0 Miles With 6,000' Elevation Gain)
19 mi
3900 m+
30k (18.5 Miles With 3,900' Elevation Gain)
13 mi
2800 m+
Half Marathon (13.0 Miles With 2,800' Elevation Gain)
7 mi
1600 m+
10k (6.8 Miles With 1,600' Elevation Gain)
Visit the organization's website for the most recent information.
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