This event is in the past.It took place on March 14, 2026 at Rodeo Beach.
Track
🥤Cupless event, bring reusable cup or bottle
🚗Crew parking restricted at some aid stations
👟Pacers allowed after mile 29.3 (50M only)
Tackle coastal bluffs, redwood groves, and punishing climbs through Marin's greatest hits. This ultra starting at Rodeo Beach strings together the Dipsea Trail, Mt. Tam, and Muir Woods into 50K or 50-mile tests of will.
Trail running challenge
Coastal race
Endurance event
Nature immersion
Track🥤Cupless event, bring reusable cup or bottle
🚗Crew parking restricted at some aid stations
👟Pacers allowed after mile 29.3 (50M only)
Tackle coastal bluffs, redwood groves, and punishing climbs through Marin's greatest hits. This ultra starting at Rodeo Beach strings together the Dipsea Trail, Mt. Tam, and Muir Woods into 50K or 50-mile tests of will.
Trail running challenge
Coastal race
Endurance event
Nature immersion