Miwok 100K
Stinson Beach, United States • 2 May 2026
Event overview
The Miwok 100K is a trail ultramarathon held in Stinson Beach, California. The 2026 edition takes place on May 2, 2026 and is limited to a field of 400 runners. The event offers a solo 62-mile (100 km) race, a team relay for four-person teams, and a paid training-plan option packaged with entry. Entries are open to adults and the published age range is 18 to 80. The published time limit for the race is 15 hours 30 minutes.
Course and support
The course runs through the Marin Headlands and surrounding coastal areas, with redwoods, ridgelines, and coastal views. The route includes single-track trails and dirt roads, with approximately one mile of paved road and over 11,000 feet of elevation gain. Course marking and volunteer support are provided, and professional medical staff are present at all aid stations. Runners receive a custom finisher award and a commemorative mug.
Sustainability and community
The event has operated cup-less since 2013 and incorporates recycling, composting, and food donation practices. The race supports several local organizations and participates in sustainability programs, and it includes a stated diversity initiative focused on improving access and visibility in trail running. Visit the organization's website for the most recent information.