One of the Bay Area’s longest-standing endurance events — now in its 18th year.

Marin County is home to a multisport tradition built on scenic courses, deep respect for the natural landscape and a spectator-friendly, family weekend. We are proud to carry that tradition forward under the SGRAIL flag.

True to the event’s roots, net proceeds support the local community — the same community that makes this place so special.

“The greater the obstacle, the more glory in overcoming it.”