Run, Ride, Swim

Something missing? Drop me a note!

3/14: Marin Ultra Challenge
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.
https://insidetrail.com/calendar/marin-ultra-challenge/ 

3/15: The Rattlesnake Ramble
Half (& 5K/10K) at China Camp State Park
https://runsignup.com/Race/CA/SantaVenetia/TheRattlesnakeRamble

3/15: Lucky Run 10K & 5K, Novato
St. Patrick’s themed community run with festive costumes and family friendly distances.
https://runsignup.com/Race/CA/Novato/TheLuckyRunNovato

3/20–3/22: Big Alta Trail Race, Marinwood
Three-day trail running event centered in Marinwood featuring 28K, 50K, and 100K races across iconic Marin trails including Mount Tamalpais and the Marin Headlands.
https://www.daybreakracing.com/big-alta

4/4: Golden Gate Headlands Marathon, Half & 10K
Scenic trail race through the Marin Headlands with views of the Pacific coastline and Golden Gate Bridge.
https://raceroster.com/events/2026/106726/2026-golden-gate-headlands-marathon-half-marathon-and-10k 

4/11: Romancing the Island Half Marathon & 10K
Trail race on Angel Island featuring panoramic views of San Francisco Bay and the surrounding islands.
https://raceroster.com/events/2026/106727/2026-romancing-the-island-half-marathon-and-10k 

4/25: Mt. Tam Wild Boar Half Marathon & 10K
Trail race through the Mount Tamalpais watershed with forested climbs and technical descents. https://raceroster.com/events/2026/106728/2026-mt-tam-wild-boar-half-marathon-and-10k 

4/26: Marin Century
One of Northern California’s most scenic organized bike rides featuring routes through West Marin farmland, redwoods, and coastal roads.
https://www.marincyclists.com/marin-century

5/2: Miwok 100K Ultramarathon
Iconic 62-mile trail ultramarathon starting in Stinson Beach with more than 11,000 feet of elevation gain through the Marin Headlands.
https://miwok100k.com

5/9: Marinduro
Presented by Marin Trail Stewards. Post-race JAMBAR podium party at Splitrock Tap & Wheel.
https://www.bikereg.com/marinduro 

5/9: Stinson Beach Half Marathon & 7 Mile
Coastal trail race starting near Stinson Beach and traversing forested hillsides and ridge trails.
https://raceroster.com/events/2026/106729/2026-stinson-beachmuir-woods-marathon-half-marathon-and-7-mile 

5/23: China Camp Trail Run (Half Marathon, 10K, 5K)
Popular spring trail race in China Camp State Park featuring rolling terrain and bay views.
https://insidetrail.com/calendar/china-camp-trail-run/ 

5/30: Marin Mile
One mile road race at Archie Williams High School Track open to all levels and ages. Supporting the Oakland youth running community through Running For A Better Oakland (RBO).
https://themarinmile.com/

6/6: Marin Off-Road
10-mile route starting from Rodeo Beach with 3 major climbs and an elevation gain of over 200 feet.
https://www.bearraceevents.com/marin-overland 

6/14: Dipsea Race
Historic 7.4-mile trail race from Mill Valley to Stinson Beach and the oldest trail race in the United States.
https://www.dipsea.org

7/4: Corte Madera Fourth of July Fun Run
Patriotic community run held before the town’s Independence Day parade.
https://www.cortemadera.org/events/4th-of-july-parade-festival-2024/ 

7/18: Muir Woods Mountain Challenge
Trail race with distances including half marathon, 30K, and 10K featuring rugged climbs and redwood forest terrain.
https://insidetrail.com/calendar/muir-woods-mt-challenge/ 

8/1: Rodeo Valley Trail Run
Trail race in the Marin Headlands with distances from 8K to ultramarathon distances.
https://insidetrail.com/calendar/rodeo-valley-trail-run/ 

8/1: Marin Century
Scenic cycling ride through West Marin with multiple route options including a full 100-mile century across rolling farmland, redwoods, and coastal roads.
https://marincentury.com/ 

8/15: Dirt Fondo
45, 32 and 24-mile options, supporting Marin County Bicycle Coalition (MCBC).
https://marinbike.org/dirt-fondo/ 

8/15: Tamalpa Headlands 50K
A rugged ultramarathon through the Marin Headlands with steep climbs, coastal ridge trails, and dramatic ocean views.
https://tamalparunners.org

8/22: Golden Gate Sharkfest Swim
Swim 1.6 miles alongside the Golden Gate Bridge in 60-62° F temps.
https://raceroster.com/events/2026/113018/2026-golden-gate-sharkfest-swim 

8/22: Walt Stack DSE Double Dipsea
A legendary 13.7-mile trail race from Stinson Beach to Mill Valley and back, covering the famous Dipsea trail twice.
https://brazenracing.com/doubledipsea/

8/29: Angel Island Half Marathon & 10K
Trail race circling Angel Island with views of Alcatraz, the Golden Gate Bridge, and San Francisco skyline.
https://raceroster.com/events/2026/116189/2026-angel-island-half-marathon-and-10k

9/13: Honey Badger Half Marathon
Half (& 5K/10K) at China Camp State Park
https://runsignup.com/Race/CA/SantaVenetia/HoneyBadgerHalf10K5K 

TBD: Tiburon Mile Open Water Swim
One-mile open water swim across Raccoon Strait from Angel Island to Tiburon.
https://rcptiburonmile.com/

TBD: Cross Country: Tamalpa Challenge
Timed cycling climb up Mount Tamalpais, one of the Bay Area’s most iconic cycling ascents.
https://www.tamalparunners.org/cross-country-tamalpa-challenge/

TBD: Novato Run4Fun
Community event hosted by the Novato Chamber.
https://business.novatochamber.com/signature-events/run-4-fun

11/7: Mt. Tam Trail Run, Stinson Beach
Begins at Stinson Beach and climbs (and climbs!) to perched views from Tam before returning via some of the best trails the Headlands have to offer until reaching the beach and bountiful post race food.  Bring the family and enjoy an afternoon with friends in the sand and surf.
https://insidetrail.com/calendar/mt-tam-trail-run/ 

TBD: Turkey Trot Fun Run, San Rafael
Thanksgiving morning community run for runners and walkers before the holiday meal.
https://www.marinturkeytrot.com/ 

11/28: Quad Dipsea
Legendary endurance race covering the Dipsea trail four times between Mill Valley and Stinson Beach.
https://www.quad-dipsea.com

12/13: Jingle Bell Run, Sausalito
Annual fun run along the Sausalito waterfront welcoming runners and walkers of all levels.
https://www.winterfestsausalito.com/jingle-bell-run-5k

TBD: Peacock Gap Trail Run
The China Camp course winds along thick forests and descend out into open trails on the San Pablo Bay side of the park. 30K 10K & Half options.
https://insidetrail.com/calendar/peacock-gap-trail-run/ 

2/6: Golden Gate Trail Run, Sausalito
Trail race in the Marin Headlands with distances from 8K to 50K starting at Rodeo Beach and featuring coastal views of the Pacific and Golden Gate Bridge.
https://runsignup.com/Race/CA/Sausalito/GoldenGateWinterTrailRun

San Francisco Running Company Group Runs
Free community runs hosted by SFRC in Mill Valley with routes on local roads and trails.
https://store.sfrunco.com/pages/weekly-runs-with-sfrc

Tamalpa Runners
Running club hosting regular group trail runs on Mount Tamalpais and surrounding Marin trails.
https://www.tamalparunners.org

Marin Trail Stewards
Community cycling rides advocating for safe biking routes across Marin towns and trails.
https://marintrailstewards.org/ 

Mike’s Bikes
Group rides and events from Sausalito and San Rafael stores.
https://mikesbikes.com/pages/community-and-events 

Splitrock Tap & Wheel Run and Ride Meetups
Regular group runs and cycling rides starting from the Fairfax bike shop with routes into the Marin Headlands and Mount Tam area.
https://www.splitrocktapandwheel.com/about/local-events-pg238.htm

Marin Cyclists Club Rides
Organized group rides of varying distances exploring Marin’s most popular cycling routes.
https://www.marincyclists.com

Marin Open Water Swim
Group that swims most Saturday mornings at  Paradise Beach Park in Tiburon.
https://marinopenwaterswim.org/ 

North Bay Aquatics
Swim meets and training for adults and youth.
https://www.northbayaquatics.org/