2021 Race Update

The 25th anniversary Miwok 100K has been postponed until May 7, 2022, due to continuing covid conditions in California. Check back in September, 2021, for details on registering for this fantastic race.

Register for the Miwok 100K Virtual Challenge! Click on Registration for details.

The Miwok 100K is one of the most beautiful and iconic trail ultramarathons in the world. The course is hilly (11,800 feet of gain) but runnable, with spectacular views of San Francisco and the Golden Gate Bridge, Sausalito, Mount Tamalpais, the ancient redwoods and the Point Reyes National Seashore.

The course features single-track trails and dirt roads with about a mile of paved road. The race is very competitive at the front, and a rewarding challenge for all. Less than an hour from San Francisco, the Start/Finish is in the town of beautiful Stinson Beach, nestled against Mount Tamalpais, with its excellent cafés, a small market, lodging, and more.

Course marking is excellent, and you’ll be supported by some of the best volunteers on a race course anywhere. We hire professional medical for all aid stations for those occasional skinned knees and such. Our 2021 runners will receive top quality Miwok logo gear, including men’s and women’s rabbit race shirts, a super-cool trucker hat, ultra-specific goodie bag items, and a custom Miwok finisher’s medal. 

Sustainability. Diversity. Community.

The Miwok 100K has focused on sustainability for over a decade, and is an industry leader in recycling, food composting, and waste minimization.  Leftover food is donated to a local shelter.

Since 2008, we have donated to local organizations that help disadvantaged and hungry children, including The Edible Schoolyard Project and EatLearnPlay.org, providing food and support to kids in the Bay Area. We also donate to Pinkathon/Breast Cancer Research Foundation, and other local groups.

We have runners from around the world, and many walks of life, working with coaches and groups, including Coach Lisa Felder, the RIDC, NBMA, BGR, and BMR, to further enhance diversity and inclusion at the Miwok 100K.