Marine Mammal 60K YMMV is an optional aided fat ass run passionately supporting:
1. run100s.com - http://www.run100s.com/
2. The Marine Mammal Center (TMMC) - http://www.marinemammalcenter.org/
3. our sport.
4. your community.
A very scenic single loop through Marin Headlands - https://www.strava.com/routes/17381926. Humbly limited to 35 lucky runners only. No lottery but may have the wait list for wannabes.