You will not stay alone. The San Francisco Trail Runners community is already waiting.

Built specifically for Trail Runners. The bulk of the chat covers weekly group long-run coordination, with offline plans routed through Mount Tamalpais and Cow Hollow Ridge.
Group vibe
Deliberately narrow, quietly efficient, quick to fold in the right people.
Example members. Real archetypes drawn from the people who already meet up here.
From Zurich
Ultra-marathon runner
From Taipei
Tamalpais sunrise regular
From Perth
Training for Trail San Francisco
From Delhi
10K-a-day addict
One number to sign up. Your group is already waiting on the other side.
Join Trail Runners