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Lag Bon 10K

Mar 22, 2026 at 8:00 AM

End of Sky Oaks Road, Fairfax CA, 94930, USA

ATRA race member Meets ATRA event standards Feature this race
—🏳️-🏴-🏳️-LAG BON 10K-🏳️-🏴-🏳️—

Would you like to experience the gorgeous trails surrounding some of Marin County’s most pristine reservoirs, while simultaneously contributing towards alleviating the global water crisis? If so, we would love to have you as a part of the Lag Bon 10K trail race!

Our goal is to raise money and awareness of the need for access to clean and reliable drinking water through our shared passion for trail running. All ticket sales collected in excess of the cost of the event will go directly to the highly effective NGO, Evidence Action for their Safe Water Now program.

Where: Lake Lagunitas Picnic Area at end of Sky Oaks Road, Fairfax CA

When: Sunday, March 22nd, 2026 – Race begins at 8:00 AM

Course Info

The Lag Bon 10K is a moderately challenging and beautiful course. On this technical run you will encounter stairs, bridges, roots and rocks as well as plenty of easy going flat trails. Elevation gain/loss is approximately 400′. Event will be held rain or shine so be prepared for cold, wet and muddy conditions as well. Start/Finish is at the Lagunitas picnic area. Aid stations/bathrooms will be after Bon Tempe Dam at the 3.5 mile point and at the Start/Finish. Although people of all abilities are encouraged to participate there will be a 2 hour limit to complete the course due to permit restrictions so a walking pace is not recommended. No dogs or strollers please.

Event History

2026
Mar 22, 2026
2025
Mar 30, 2025View Results →
2024
Mar 24, 2024View Results →
2023
Mar 19, 2023View Results →
2022
Mar 20, 2022View Results →
2020
Mar 22, 2020

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