8 events in Marin County, California

From big races to Saturday morning group runs—find half marathon events and connect with the local endurance sports community.

• 2026 Stinson Beach/Muir Woods Marathon, Half Marathon & 7 Mile [envirosports.com] [Register at raceroster.com]
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  Sat, May 09, 2026 at 8:00 AM

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  Waiting at the Stinson Beach start line will be the only time you spend at sea level during this challenging trail run. From the word "Go" you'll be heading, up, up and away into the thick wooded...

  Waiting at the Stinson Beach start line will be the only time you spend at sea level during this challenging trail run. From the word "Go" you'll be heading, up, up and away into the thick wooded trails of Muir Woods. You'll follow the legendary Dipsea trail to Steep Ravine, where you'll climb a wooden ladder, march up natural rock and wooden staircases and scramble under tree trunks. Along the way, enjoy the sounds of babbling brooks and waterfalls. Drink in the fresh smell of the towering redwoods and oaks that surround you. Your summit will be rewarded with panoramic vistas as you begin your descent back into Stinson Beach. The event is limited to 300 participants so don't wait too long to register!

  7 Miles 21k Half Marathon Run Trail

  Panoramic Highway, Marin County, California, 94970, United States
  OpenStreetMap Google Maps
• Stinson Beach/Muir Woods Marathon, Half Marathon & 7 Mile [envirosports.com]
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  Sun, May 10, 2026

  7 Miles Half Marathon Marathon Run

  99 Puente Del Mar, Marin County, California, 94970, United States
  OpenStreetMap Google Maps
• China Camp Trail Run [insidetrail.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, May 23, 2026

  5k 10k Half Marathon Run Trail

  800 N San Pedro Rd, Marin County, California, United States
  OpenStreetMap Google Maps
• Muir Woods Trail Run [insidetrail.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Jul 18, 2026

  10k 30k Half Marathon Run Trail

  1 Calle Del Sierra, Marin County, California, 94970, United States
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• Rodeo Valley Trail Run [insidetrail.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Aug 01, 2026

  8k 30k 50k Half Marathon Run Trail Ultra

  marin headlands ggnra, Marin County, California, United States
  OpenStreetMap Google Maps