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Marin Ultra Challenge

Sat March 9, 2024 Sausaliito, CA 94965 US Directions


50 Mile

6:30AM PST


6:30AM PST

Race Website

Additional race information can be found at


110500 Mitchell Road
Sausaliito, CA US 94965


The Marin Ultra Challenge, our premier Marin County long distance trail race, delivers ample hills and sweeping descents. 2022 marks the 9th edition of this tour of some of Marin’s best trails (we lost a couple years due to the pandemic). Meticulous effort went into the design of each course for the MUC; all three distances are physically demanding (the 50 Mile has just about 11,000 feet of elevation gain) and exceptionally beautiful. The journey begins at the black sands of Rodeo Beach, and traverses the Marin Headlands, Stinson-facing Mt. Tamalpais and Muir Woods, exhibiting a range of terrain, from exposed fire-roads with incredible coastal and inland views to tight, technical single-track with redwood canopies. There is very little trail overlap, and Jim Vernon, from The Endurables and Hydrapak, spent hours and weekends developing these spectacular custom courses–we are super excited to show it off. You’ll quickly realize why Marin County has become the ultimate trail runner’s destination.

Park Information: Marin Headlands, Mt. Tam State Park, Muir Woods

Start Times:
50 Mile – Saturday, March 12 @ 6:30 AM
50K – Saturday, March 12 @ 7:00 AM

Check-In & Bib Pickup:
Early Check-In:
Friday, March 11 @ 12:00 PM – 6:00 PM
San Francisco Running Company
247 Shoreline Highway, Mill Valley, CA 94941

Race Morning:
Saturday, March 12 @ 5:30 AM – 7:00 AM
Rodeo Beach

Time Limit: There is a 14.5 hour time limit for the 50 Mile race. All runners must be off the course by 9:00 PM.

Parking:  Free parking is available in the surrounding areas to the Start/Finish at Rodeo Beach. Runners may utilize the pullouts along Mitchell Road, along the beach, the annex lot below the Marine Mammal Center, and the Smith Road Parking Lot (Gerbode Valley Trailhead) along Bunker Road. The walk from the Marine Mammal Center lot to the Start/Finish is about 1/3 mile. Parking fills up early, and the later you arrive the further you will have to walk, so please plan your arrival time accordingly.

Golden Gate National Recreation Area
Rodeo Beach
11050 Mitchell Road, Sausalito, CA 94965
Click for Directions

Capacity: The Marin Ultra Challenge has a capacity of 400 runners, across all distances.

Timing:  All races are professionally chip timed, utilizing MyLaps and Race Director, ensuring your time is captured as accurately as possible. Disposable chips are attached to back of each bib number.

Post Race:  We offer a broad selection of sweet and salty snacks, as well as fresh fruit and a diverse line up of pre-packaged food options (chips, cakes, jerkey, etc.). We also offer items off of the grill, which typically varies throughout the day and can include: quesadillas, chicken-apple turkey sausage, chicken noodle soup, and a vegan soup option.

Dog Policy: As much as we love dogs, they are unfortunately not allowed on the Marin Ultra Challenge course. You may have dogs, on leash, at Rodeo Beach.

Race Contact Info

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