March ultramarathons in United States (Northeast)

50-mile trail event in the South Mountain area, with a welcoming, community-driven atmosphere and local trail running and hiking focus

Fairly flat 1.25-mile park loop with frequent finish area passes, ample amenities, and a spectator-friendly setting

Flat, fast oval track loops in cool conditions with official record certification, frequent aid stations, and a competitive, fully-supported atmosphere

Ultra trail race at Blue Marsh Lake featuring a no-frills course, solid aid, and medical support, designed for pure trail running challenge

Hilly, multi-loop course on singletrack and horse trails at Codorus State Park, with challenging terrain and unpredictable weather conditions.

Multiple-loop endurance event on a wide gravel berm trail with spacious layout and a centrally located aid station

Multi-lap Monastery Trails course with a 50K trail option, scenic spring setting, and a festive St. Paddy’s Day atmosphere.

Compact looped courses through Stratford’s town-forest terrain, with a low-key, hometown-style trail atmosphere and repeated-lap endurance focus.

Flat 50k off-road trail course with professional timing, water stops, and finisher medals

Ten climbs and 10,000 feet of elevation gain over nearly 40 miles on the demanding trails of the DWG region, featuring mountain views and waterfalls.

New England dirt trails marking the return of spring, with fresh terrain after winter

Alternating farmland and woodland day loop, night double track and road sections, with cow pastures, hayfields, creekside trails, and flat segments

Two-loop certified course along rivers, bridges, and forests in Lackawaxen, PA, with Boston qualifier status and on-course support

Technical 6.7-mile trail loop with 1,750 feet of ascent around Mt Tammany; demanding 30K and 50K+ distances for seasoned ultrarunners

Multiple 4-mile loops around Hopewell Lake with 45% paved roads and 55% rugged trails; remote course support available only at loop completion.

Multiple timed race options on a 5k trail loop, 250 feet of elevation gain per lap, set in a picturesque spring landscape

Brutally demanding park course with smooth carriage roads, rocky twisting singletrack, steep vertical, technical footing, and serious climbing