Dirt Circus - San Francisco

San Francisco, United States • 6 Jun 2026

Dirt Circus - San Francisco

Dirt Circus is a free community event organized by UltraSignup that highlights local races, run clubs, brands, and trail-running businesses. The one-day festival in Mill Valley / San Francisco includes a social group run, an expo area with brand booths, food, and a raffle.

A group run meets at the San Francisco Running Company. Participants can choose between these casual route options:

  • 3.2 mi group run
  • 4.5 mi group run

The event features vendor booths from running brands and local partners, product demos, and opportunities to speak with race directors and coaches. Onsite vendors listed include adidas TERREX, La Sportiva, On, and others. Attendees may receive an UltraSignup branded Shoe Bag Lite at check-in while supplies last, and there will be a face decorating and glitter station.

This is a CUPLESS event, so participants should bring their own water bottles or cups for refills. Dogs are not allowed except for service animals. Parking is limited; on-site parking at San Francisco Running Company has 40 spaces, additional parking at Peace Lutheran Church has 50 spaces, and two alternative lots offer roughly 50 and 30 spaces each with a short walk to the store.

Preorders are available for a city-specific Dirt Circus T-shirt with a preorder deadline of May 10, 2026. Visit the organization's website for the most recent information.

Race information

5 mi
Social Run Long
3 mi
Social Run Short
Visit the organization's website for the most recent information.
Trail runs nearby

A trail running event at Point Pinole on May 30, 2026, offering a half marathon, 10K and 5K. The original Brazen Racing event welcomes runners and walkers and includes bib pickup, posted results, free photos and volunteer roles.

Experience a technical trail race through the redwood groves of Joaquin Miller and Redwood Regional parks. Choose from multiple distances ranging from an 8K to a 50K ultra marathon on accurately measured courses.

San Mateo PAL's May 30, 2026 community event at Seal Point Park features a 5K run/walk, a 10K run, a free Wellness Fair, and a yoga option. Race entries include a t-shirt and finisher medal, and vendor booths are available.

A one-day festival in Berkeley on May 31 featuring free road and trail runs, demo shoes from major brands, a $10,000-plus raffle, food and beer, and fundraising for youth running in Oakland.

Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.