6hr ultramarathons in California, United States in 2026

Looped 1.3-mile course featuring trail, grass, and bike path segments in Montgomery Waller Community Park, near Imperial Beach and Chula Vista

Scenic loop route on dirt fire trails with modest elevation gain and classic trail ambiance

Morning trail run on single and double track paths at Thomas F. Riley Wilderness Park, surrounded by Orange County scenery

Time-based ultrarun in Napa's Skyline Wilderness Park, 4.16-mile trail loop with 815 feet of gain per lap through rolling hills and historic landscapes

Trail route through Mendocino Woodlands State Park with forest scenery, tent cabin options, and meals included on Saturday

Looped 0.85-mile paved bike path through scenic Auburn, with picturesque ponds, shaded stretches, and multiple distance options

One-mile hard-packed dirt loop with direction changes every four hours, frequent aid stations, and personal camp support throughout timed ultra options.

Varied Skyline Park trails with multiple 4.1-mile loops, 815 feet of elevation gain per lap, fire roads and singletrack, run at own pace

Time-based ultrarun in Napa's Skyline Wilderness Park, 4.16-mile trail loop with 815 feet of gain per lap through rolling hills and historic landscapes

Timed trail run at O'Neill Regional Park with scenic canyon loops, dense oak and sycamore groves, cactus-dotted hillsides, and 500 feet of elevation gain per 2.

2-mile double track dirt loop with 128 feet of gain per lap, mountain desert scenery, starlit night running, camping on-site, real bathrooms and aid station

Two-loop course through San Timoteo Canyon with self-timed 2, 4, or 6 hour options, central aid station, and post-race BBQ

Rugged mountain hills, fire roads, and single-track trails through the Anza-Borrego Desert with alpine loops among junipers, pines, and oaks

Forest paths and redwood groves at Huddart Park in Woodside, CA

Scenic loop along paved paths beside Lake Miramar with reservoir views, frequent aid stations, chip timing, and accessible gear support

Timed trail run at O'Neill Regional Park with scenic canyon loops, dense oak and sycamore groves, cactus-dotted hillsides, and 500 feet of elevation gain per 2.

Timed distance ultramarathon on a 1-mile paved loop at Mary Grogan Community Park during the winter solstice

Loop course just under a mile in Jacob Myers Park, autumn scenery, multiple time options for distance-focused racing