Trail race guide
Marin Ultra Challenge: date, distances, elevation, and registration
Marin Ultra Challenge is a very hard trail race organized by Inside Trail. It offers 50K, 50M distances on Saturday, March 13, 2027.
- Date
- Saturday, March 13, 2027
- Location
- Rodeo Beach · Sausalito
- Distances
- 50K · 50M
- Elevation gain
- 50K ~6,000′ · 50M 10,550′
- Difficulty
- Very hard
- Registration
- Check official page
- Official source
- Inside Trail · Verified Aug 30, 2026
Questions about Marin Ultra Challenge
When and where is Marin Ultra Challenge?
Marin Ultra Challenge is scheduled for Saturday, March 13, 2027 at Rodeo Beach · Sausalito.
How do I register for Marin Ultra Challenge?
Use the official registration button on this page. Registration, payment, waivers, transfers, cancellations, and refunds are handled by Inside Trail.
What distances are available?
Marin Ultra Challenge currently lists 50K, 50M.
Can I invite a friend?
Yes—use the prefilled text or email invitation. It includes the race date, a suggested distance, and this guide.