100K

Run the full 62 miles of the Miwok 100K course—one of the most iconic and challenging trail ultramarathons in the world. This race demands everything you have: physical endurance, mental toughness, and strategic pacing.

You'll face over 11,000 feet of elevation gain across some of the most stunning terrain in Northern California, from the misty redwood groves to exposed ridgelines with panoramic ocean views. The course features tight intermediate cutoffs at Tennessee Valley (8:00 AM), Cardiac (1:30 PM), Randall Trailhead (5:10 PM), and Bolinas Ridge (6:50 PM), requiring consistent forward progress.

Race Qualifiers

With a 15.5-hour time limit, this race is a true test of ultra-distance running ability. The Miwok 100K is a Western States 100 qualifier and UTMB Index race, making it a critical stepping stone for runners aspiring to compete at the highest levels of trail ultramarathon racing.

Support & Aid Stations

Well-stocked aid stations, professional medical support, and an incredible community of volunteers make this race unforgettable.

Course Overview

The race begins at Stinson Beach Community Center before dawn, with headlamps lighting the way up the Dipsea Trail through "the moors" and down Insult Hill. From there, runners traverse a stunning loop through the Marin Headlands, passing through iconic locations like Cardiac, Muir Beach, Tennessee Valley (with crew access), Bridge View, and Randall Trailhead (where pacers can join).

Terrain & Highlights

The course includes technical descents on Matt Davis Trail, challenging climbs on Bolinas Ridge, and breathtaking views of the Golden Gate Bridge, Pacific Ocean, and San Francisco skyline. The final miles descend through redwood forests before emerging at the finish line back at Stinson Beach.

Course Conditions

The course is well-marked, but runners must be prepared for fast-changing weather, exposed sections, and technical terrain. This is not a race for beginners—it requires experience with trail ultras and self-supported effort, but the reward is experiencing one of the world's most beautiful ultramarathon courses.