The Mendocino Running Festival, set for September 11, 2026, invites runners to an unforgettable weekend immersed in the ancient redwood forests of Mendocino, California. Formerly known as the Ancient Redwood Running Festival, this event offers a challenging yet breathtaking experience within the historic Mendocino Woodlands State Park. Participants can choose from a 12-hour or 6-hour timed race, a Half Marathon, or a 10K, all run on a picturesque 6-mile (or 6.2-mile) looped course. The course, consisting entirely of singletrack trail, features approximately 875 feet of climb per loop, taking runners from the Big River valley to the valley's edge, across log bridges, and over murmuring streams. Expect stunning scenery with panoramic views, lush redwoods, and glimpses of the Big River.

Runners consistently praise the festival's atmosphere and organization, describing it as a "running family camp" where disconnecting to reconnect is paramount. Two well-stocked aid stations per loop are renowned for "spoiling" participants, providing a variety of fuel, and post-race meals that include a hearty lunch for 10K and Half Marathoners, and a more substantial dinner for the ultra-distance runners, complete with beer and wine. For those tackling the longer distances, hot foods and liquids will also be available at aid stations from Saturday evening through Sunday. Typical race day conditions in September see comfortable lows around 52F, climbing to highs of 91F, with a minimal 1% chance of precipitation.

This unique event extends beyond the race itself, offering a full weekend festival experience with private group camping options, including tent cabins and RV/tent sites. Non-running friends and family are encouraged to join, with complimentary yoga sessions and access to the charming coastal town of Mendocino just minutes away. Runners have lauded the "most beautiful views" and the well-marked course, making the Mendocino Running Festival a beloved fixture on the trail running calendar.