• Miwok 100K trail

    Miwok 100K Trail Race

  • Miwok 100K trail

    Miwok 100K Trail Race

Join us for the 25th Anniversary




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. 

The Miwok 100K has focused on sustainability for over a decade, with recycling, food composting, and waste minimization. Runners bring their own cups/hydration system. Leftover food is donated to a local shelter.

We have runners from many states and countries, and many walks of life. Since June 2020, we have been working with a number of coaches and groups, including Coach Lisa Felder, the NBMA, BGR, and BMR, to further enhance diversity and inclusion at the Miwok 100K.

Since May 2008, we have donated to local organizations that help disadvantaged and hungry children, including The Edible Schoolyard Project, and EatLearnPlay.org, which provides food and support to kids in Oakland and the surrounding area, along with Pinkathon/Breast Cancer Research Foundation, and other local orgs.

2021 Registration Info

Due to the “covid-cancellation” of the 2020 Miwok 100K, we will not use a lottery for the 2021 event. Spots will be filled first-come, first-served after our 2020 entrants have re-registered. We will have a waitlist once the entrant list is full to improve runners’ chances of getting to run this beautiful ultra – our 25th Miwok.

Registration for the 2020 entrants is on Ultrasignup.com November 1 through November 7, 2020. At 8:00 a.m. PST on November 8th, registration will open for everyone else. See our Registration page for full details.

We will update the race information on this website in October to reflect current regional regulations regarding sporting events.

Runners in redwood forest on Miwok trail
Miwok 100K Trail Race volunteer dressed as pirate and directing runners


If you’d like to be indispensable (and have a lot of fun without running all that way), click here to volunteer.

Email us at

Miwok 100K

25 years

The Miwok 100K was founded in 1996 by Kellie Sheehan. That first race, held on May 6, 1996, had about 70 intrepid souls on the start line. Tia Bodington has directed the race since 2004, growing the event from 236 starters to its current field of 450.

Quicksilver Running Club runner


sunset at Point Reyes


The Miwok 100K is featured in The Rise of the Ultra Runners, by award-winning author Adharanand Finn (Pegasus Books/May, 2019).
Check out Glenn Tachiyama’s fantastic 2019 Miwok 100K race photos.
Go to RootsRated’s Epic NorCal Trail Races for a sweet note on the Miwok 100K.
Questions? Email the Race Director, Tia Bodington, at miwok100k@gmail.com.

sponsors & partners

Our thanks to the wonderful sponsors and vendors who are providing cool stuff and services for the 2020 Miwok 100K runners. More to come! We’d also like to thank the California State Parks, the Golden Gate National Recreation Area, and Point Reyes National Seashore for their work to manage and maintain the trails we all love to run on!

This year, our donations go to EatLearnPlay.org, and the SF Pinkathon/Breast Cancer Research Foundation.

UTMB Qualifier (4 pts)

WS100 Qualifier

© Miwok 100K. All rights reserved. Site developed & hosted by Rogue Web Works.
Race photography by Glenn Tachiyama. Website photography by Glenn Tachiyama, Luis Escobar, Susan Donnelly, Augusto DeCastro, and Stacia.