January ultramarathons in United States (East Coast)

Point-to-point ultramarathon on remote single track from Hobe Sound Beach to Lake Okeechobee, crossing diverse Florida ecosystems and rugged terrain

Groomed forest trails on a three-lap loop, limited course marking with self-navigation, relaxed format with route flexibility

Tranquil Wekiwa Springs trails, challenging ultra course, scenic views, local wildlife, solo or relay options, festival atmosphere with on-site aid

Scenic loop course at Holland Park with 6- and 12-hour endurance options, lap tracking with rocks, passing local hotspots

Scenic 6.2-mile trail loop at Bradley Palmer State Park, repeatable up to five times, on beautiful park trails with a relaxed, non-competitive atmosphere.

Shaded singletrack weaving through oak hammocks and classic Florida scenery in Withlacoochee State Forest

Looped course with flexible lap totals and early start option, welcoming atmosphere to begin the year with fellow runners

Classic early-season New England trail ultra with deep regional roots and longstanding community tradition.

Looped course with aid station every 1.24 miles and option for personal supplies at the trail's edge

Scenic Willis River Trail loops with stream crossings, rolling hills, and a Bear Creek extension for the 50k option

Scenic marathon and half marathon routes through Walt Disney World Resort park landmarks and festive race atmosphere

Three-section winter course with open flat stretches, runnable dirt roads, and a technical but runnable finish; loop format with easy access between laps.

Self-navigated urban ultra spanning Miami’s landmarks, with flexible routes, vibrant city scenery, and a mix of strategic shortcuts and scenic paths

50k around scenic Salem Lake: wide rolling dirt trail, brief paved section, quiet woods, shoreline views, and gentle terrain.

50K of repeated 12.5K loops at Salem Lake, with a scenic lakeside setting and a familiar flow that settles in over multiple laps.

Flexible 30-hour format, self-timed endurance run with medals, distance tokens, and a 100-mile belt buckle award