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    Miwok 100K Ultramarathon
  • volunteer
    Miwok 100K Ultramarathon

Volunteer, Driving Directions

Volunteer!

The Miwok 100K could not take place without many wonderful volunteers who mark the course, work at the aid stations and the start/finish, and help remove the ribbons and clean up afterwards.

If you’d like to be indispensable (and have a lot of fun without running all that way), email Volunteer Coordinator/Co-RD Magda Boulet, at magda@miwok100k.com with the specific spot you want (see below), or tell us when you’re available and we’ll place you at the perfect location.

Volunteers who work at least 8 hours at the 2025 race will receive priority registration for the 2026 Miwok 100K.

2025 Volunteer Opportunities:

  • Friday, 5/2 – Mark a section of the course.
  • Saturday, 5/3– Staff an aid station:
    •  Start: 3:30 a.m. – 8:00 a.m.
    •  Finish: 12 Noon – 9:30 p.m.
    •  Muir Beach: 5:45 a.m. – 1:00 p.m.
    •  Tennessee Valley: 6:15 a.m. – Noon
    •  Randall: 10:00 a.m. – 6:00 p.m.
  • Saturday, 5/3 – Sweep a section of the course; 10-15 miles, close behind the last runner.

If you’re running the race, consider asking a friend or two to come along as volunteers. You’ll all have fun, and you won’t have to drive yourself all the way home after running 62 miles!

Driving Directions

VOLUNTEERS & CREWS:

Here are the location names to plug into your map app for directions to the Start/Finish & Aid Stations. We recommend you do this before race day, since there is no cell service in some areas of the course.

CREWS:

Remember, crews are only allowed at “Crew OK” locations:

  • Stinson Beach Community Center (for Start/Finish; Crew OK)
  • Marine Way, Stinson Beach, CA (for race parking; Crew OK)
  • Muir Beach Parking Lot (Crew OK after 8:00 a.m.)
  • Tennessee Valley Trailhead (Crew OK)
  • Conzelman Rd & McCullough Rd (BridgeView)
  • Cardiac Hill, Mill Valley
  • Bolinas – Fairfax Road & West Ridgecrest Boulevard
  • Randall Trailhead (Crew OK)

Thank You!

Big thanks to our 2024 Captains and Clubs, along with all the fantastic 2024 volunteers:

Course Captain: Ken Michal
Start/Finish: Jim Richards
Supplies: Gary Gellin & Richie Boulet
Timing Captain: Lisa Heinselman
RD Support: Erick Kasiulis & Ken Preston
Vocals: Michelle Fallone
Muir Beach: Fred Liebes & Charlene Bayles, with Charles Zuckerman
Tennessee Valley: Stan Jensen, with Nomadic Adventure Club
Bridge View: Ana Braga-Levaggi, with RBO
Cardiac: San Francisco Running Company 
Bolinas Ridge: Coastside Running Club, with Paula Leuzzi & Margaret Branick-Abilla
Randall Trail: Chuck Wilson (& the Barfies)