Miwok 100K
About this race
The Miwok 100K is one of the most beautiful and iconic trail ultramarathons in the world. We believe everyone deserves a shot at something extraordinary. The Miwok100K is about the everyday runner who shows up ready to dig deep on some of the most breathtaking trails around. Set in the Marin Headlands just north of San Francisco, The Miwok 100K offers 62 miles of gorgeous trails, over 11,000 feet of gain, and nonstop views, from redwoods to ridge lines to crashing coastal cliffs.
The course features single-track trails and dirt roads with about a mile of paved road. The race is 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 2026 runners will receive a custom Miwok 100K finisher’s medal and a Miwok 100K sweatshirt.
We have 3 options for you to participate in our event:
1. Miwok 100K on May 2, 2026 (When the race is full, you will be placed on a Waitlist. Your card will not be charged until you are offered a spot, and accept it. Registered runners who drop prior to February 1 will receive a $124 (40%) refund.
2. Miwok 100K on May 2, 2026, PLUS a 16 week training plan from coach & Race Director Magda Boulet
3. Miwok 100K Team Relay on May 2, 2026 (must have 4 participants per relay)
Please make sure you sign up for the correct event!
Ready to test your limits? The Miwok 100K brings a highly anticipated Ultra to Stinson Beach on January 6, 2025. Expect a fantastic route right in the heart of California.
Pick your distance
Running
18-week Training Plan Only
The Training Plan begins Monday January 6, 2025. Participants will receive an email from Coach Magda with a detailed training plan every 4 weeks, with options for novice and intermediate ultrarunners. Experienced ultrarunners can register for the Training Plan, too, for some fun workout ideas. And 100% of the revenue from the training plan purchase will support our Diversity Initiative including the wonderful non-profit Running For A Better Oakland who strive to build a tolerant, healthy, and prosperous community through the discipline and rigor of a structured running program.
16-week Training Plan
We are excited to offer a 16-Week Training Plan, created by 2008 US Olympian & 2015 Western States 100 Champion, Magda Boulet. This plan will offer tips and tools related to training and racing the Miwok 100K race but can be used for any other challenging spring trail race. The Training Plan begins Monday January 12, 2026. Participants will receive an email from Coach Magda with a detailed training plan every 4 weeks, with options for novice and intermediate trail ultra runners. Experienced trail ultra runners can register for the Training Plan and receive some fun workout ideas. This is a great gift for any trail runner in your life.
Trail running
Miwok 100K
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 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 2025 runners will receive a custom Miwok 100K finisher’s medal and a custom Miwok 100k waterproof dry bag.
Miwok 100k plus 18 week Training Plan
We are excited to offer a 18-Week Training Plan for the 2024 Miwok 100K race, created by 2008 US Olympian & 2015 Western States 100 Champion, Magda Boulet. Our goal is to offer you tips and tools related to training and racing, and the Miwok 100K course. The Training Plan begins Monday January 6, 2025. Participants will receive an email from Coach Magda with a detailed training plan every 4 weeks, with options for novice and intermediate ultrarunners. Experienced ultrarunners can register for the Training Plan, too, for some fun workout ideas. Our 2025 runners will also receive a custom Miwok 100K finisher’s medal and a custom Miwok 100k waterproof dry bag. And 100% of the revenue from the training plan purchase will support our Diversity Initiative including the wonderful non-profit Running For A Better Oakland who strive to build a tolerant, healthy, and prosperous community through the discipline and rigor of a structured running program. If "Miwok plus Training Plan" displays as full, please sign up for the Miwok 100K above, and we'll send you a link next week to sign up for the Training Plan.
Miwok 100K Relay - 20 Teams of 4 runners
A fun option to participate in the Miwok 100K by forming a 4-person Relay team who covers the same 100K course! This is a great option for those who don’t want to or can't race the entire distance and are looking for a fun way to participate in all the action. Same course, same day, same time, but in fun size segments of approximately 26, 9.5, 14 and 13 miles. The first leg of the relay begins at the start line, heading south all the way to Bridge View and back to Tennessee Valley for the second time. It’s the longest leg of the relay at 26 miles long. Leg #2 takes off from Tennessee Valley and heads North up Mt. Tam to Cardiac. It’s the shortest leg at only 9.5 miles, but the climbing more than makes up for the lack of distance. Leg #3 takes over at Cardiac and traverses the beautiful Coastal Trail and ends at the Randall aid station for a cool 14 miles. The anchor leg takes it home from Randall back to Stinson Beach and is 13 miles long. All 2025 relay runners will receive a custom Miwok 100K finisher’s medal and a custom Miwok 100k waterproof dry bag.
About Stinson Beach
Miwok 100K takes place in Stinson Beach, California, United States. The local timezone is America/Los_Angeles.
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Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.
