Come Run, Come All to Dirt Circus San Francisco, a free community event by UltraSignup, together with San Francisco Running Company (SFRC)!
The FREE one-day trail running festival will highlight local races, run clubs, brands, and other local businesses. The event includes a community social run, food, a raffle with tons of prizes, camaraderie, and so much more. Come and join us under the big top.
Advance registration is required and opens March 6, 2026:
https://ultrasignup.com/register.aspx?did=133533
Join our online community at:
https://www.facebook.com/groups/1764061477492292
Follow us on Instagram @DirtCircus
Dirt Circus is a series of FREE community events organized by UltraSignup to celebrate local races, and race directors. We are bringing together the local running community to share everything we love about trail running.
Huge thanks to our local race partners Bay Trailrunners, Everyday Endurance Races, Scena Performance, Sky Breaker Racing, Tamalpa Headlands 50K, Terra Loco, and Wandering Soles Adventures.
Big shout out to our series partners SILO and Wildsense! All participants receive a sweet UltraSignup branded SILO "Shoe Bag Lite" upon check-in (while supplies last). And don't forget to visit the Wildsense face & body glitter station to add a little extra sparkle to the day!
EVENT DETAILS
Saturday June 6, 2026 at SFRC
7:00am - Group Run check-in, shoe demos & face glitter station!
8:00am - Group run starts!
Choose between a casual 3.3 and 4.5 mile trail run with friends! All paces welcome - even hiking.
8:30-9:00am - Return from the Group Run to SFRC.
Pancake breakfast and RD expo!
10:00am-12:00pm - Raffle, Brand Expo, Social Connections
Get excited for raffle prizes from brand partners, race entries, and cool swag & apparel! We'll have brand booths and tables set up when you return from your run, whatever distance you chose. Talk to Race Directors, learn about local races, and maybe test out some hydration and nutrition brands!
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