6hr December ultramarathons in United States

1.1-mile loop with 340 feet of climbing per lap, steep ascents, runnable sections, and a field descent on double track logging road

Certified 2.022-mile soft chat loop at former golf course, multiple timed races, strict cutoff rules, fully stocked aid, RV camping and tent space

Flat, sea-level loops with minimal elevation gain and a lively event village atmosphere

Multi-hour trail run and mountain bike loops through Camp Grier’s wooded trails, festive atmosphere, and community fundraising in Old Fort, NC

Certified paved loop on the shore of Lake Grapevine, with lake views, changing direction, and a spectator-friendly timed ultra format.

Beachside 6-hour ultra with ocean sunrise views, firm sand loops, small field, and dedicated volunteer support at each aid station

Festive 1.17-mile loop at Cape Fear Shiner Park, scenic trails with a short paved section, timed ultra options, accessible aid station and setup area

Repeated 5-mile loops around Lake Wailes on grass and asphalt, with a central village hub, frequent support, and a spectator-friendly format.

Repeated climbs of Cardiac Hill on a 2.5-mile out-and-back loop over challenging terrain in a 6-hour trail event

Compact loop course in Springfield, eight laps for the full marathon distance, late-season timing, supporting local charities

Scenic 5K looped trail at Fort Steilacoom Park with 3, 6, and 8 hour timed run options and convenient access to personal aid stations

USATF-certified 1.0-mile loop around Cottonwood Lake with lake views, challenging endurance events including 24 Hour Solo and 100 Mile distances

2.2-mile loop course with lap format at Fleet Feet Mechanicsburg, annual event supporting Communities Rising initiatives for children in Southern India.