Articles

Belgian Ultrarunner Karel Sabbe's Record-Breaking Pacific Crest Trail Run Showcased in New YouTube Documentary

Explore Karel Sabbe's record-breaking Pacific Crest Trail run in a riveting documentary. Jour..

Trail Running: How it Can Help Reduce Stress and Anxiety

Trail running is an effective way to reduce stress, anxiety, and improve physical and mental he..

Trail Running vs. Road Running: Which One Is Right For You?

When it comes to running, there are two primary options to choose from: trail running and road..

Dirt Circus - San Francisco

Name: Dirt Circus - San Francisco
Start: 2026-06-06
End: 2026-06-06
Location: SoMa

SoMa, United States • 6 Jun 2026

Dirt Circus - San Francisco (June 6, 2026)

Dirt Circus - San Francisco is a one-day, free community running festival organized by UltraSignup. The event takes place in the San Francisco / Mill Valley area at 247 Shoreline Hwy, Mill Valley, CA. The festival highlights local races, run clubs, brands, race directors, coaches, and other local businesses. The program includes a social group run, an expo with brand booths, a pancake breakfast and other food, face decorating and a glitter station, and a raffle with apparel and partner swag.

Event details and logistics

The group run offers choices of:

3.2 mi casual route
4.5 mi casual route

All paces are accommodated and costumes are encouraged. The event is cupless - participants should bring personal bottles or cups for water refill. Dogs are not allowed except service animals. Local store partner: SF Run Co. Onsite vendors and run clubs are listed as coming soon. Registration opens March 6, 2026, and preorders for the event T-shirt close May 24, 2026. Parking is limited; on-site parking has 45 spaces. Alternative lots include Manzanita Park & Ride (about a half-mile walk/jog, 50 spaces) and Alamonte Blvd & Miller Ave (about a half-mile walk/jog, 30 spaces). Visit the organization's website for the most recent information.

United States California SoMa

Race information

Registration

5 mi

4.5 Miles

3 mi

3.2 Miles

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday Jan 31

Coyote Hills Run

Races at Coyote Hills Regional Park in Fremont include a half marathon, 10K and 5K along mixed dirt, paved and boardwalk trails by the bay. Courses have minimal climbing and provide marsh and shoreline views.

Saturday Feb 7

Golden Gate Trail Run

...

Run the stunning coastal trails around Rodeo Beach at the Golden Gate Trail Run, with distances from 8K to 50K to suit all levels. Expect rugged singletrack, stocked aid stations, generous finisher medals, and unforgettable views.

Saturday Feb 14

Bay Breeze - San Leandro

Scenic races at San Leandro Marina on February 14, 2026, with half marathon, 10K, 5K and a remote runner option. The mostly flat bayside course stays close to the water and offers views of San Francisco and the Bay.

Saturday Feb 21

Redtail Ridge

...

Trail races at Lake Chabot on February 21, 2026, from 5K to 50K across dirt trails, fire roads and some pavement, timed with disposable chips. Aid stations are stocked and the event is cupless so runners carry their own bottles or cups.