Ultramarathons in California, United States in 2027

Rugged Lost Coast landscapes, remote backcountry gravel and pavement, starting from Horse Creek Mountain trailhead near Shelter Cove

Scenic trail routes through Hacienda Hills with Bay Area views and challenging elevation at Almaden Quicksilver County Park

Out-and-back ultra across Catalina Island with rugged terrain, Pacific Ocean views, and possible bison sightings from start and finish in Avalon.

Scenic, mostly fast trails with rolling singletrack, local landscapes, and a signature climb to Raptor Ridge on a 50-mile course suitable for all levels.

Western States trail route featuring No Hands Bridge, K2 training hill, single-track along American River, Robie Trail, Dead Truck, Goat Hill, and Overlook Hill

El Dorado Trail route with stretches of pavement and rugged, unpredictable terrain; five minimal aid stations; self-supported format

Lush trails through Huddart Park, King's Mountain, and Bear Gulch surrounded by towering redwoods and dense ferns

95% single-track course along the Sweetwater Trail, winding through oak-dotted hills and Folsom Lake’s edge with Sierra foothill views

Rugged single-track trails and rolling hills on dirt ranch roads, significant elevation changes, panoramic West Cuesta Ridge views, historic barn setting

Rugged Santa Monica Mountains singletrack on the Backbone Trail, with ocean views and nearly 11,000 feet of climbing on the 50-mile course.

Trail route through Calico Ghost Town and Mining District, featuring rugged Calico Mountains terrain and historic mining landscapes.

Lakeside single-track and dirt roads at Lake Hodges, featuring varied terrain, scenic views, and challenging elevation gains in Southern California.

24-hour format on the rugged Molcajete 1.0 loop, repeated again and again for a climbing-heavy endurance test.

Fast, mostly flat 4.85-mile loop combining paved bike paths and wide dirt trails along the American River Parkway, crossing Guy West and Watt Bridges

Scenic trails from Hacienda Entrance through Sierra Azul, summit finishes on Bald Mountain and Mt. Umunhum, diverse terrain and challenging climbs

Scenic 50-mile route at Fort Ord National Monument featuring single-track trails, rocky climbs, military history, and panoramic coastal views

Historic former Army landscape with coastal trails, preserved nature reserves, and sections of Fort Ord National Monument

Pacific Coast scenery and Marin Headlands landscapes, with views of Tiburon, San Francisco, and the Golden Gate Bridge

Rugged 50K in Angeles National Forest with 9,000+ feet of climbing and descending on mostly dirt trails through steep canyon terrain.

12-hour overnight race on a one-mile loop, with rest and refuel zone at the start area and flexible pacing for runners of all levels