October ultramarathons

Demanding 42 km course for experienced athletes, plus a 26 km option; scenic routes with challenging terrain and endurance-focused racing

Certified one-mile loop of pavement and crushed gravel at Sussex County Fairgrounds; flat, fast and highly runnable for 50K to 100 miles.

Demanding Copper Canyons trails with sweeping canyon views, rugged terrain, and paths rich in Rarámuri heritage

One-mile loop on grass and mulched paths, winding around ponds and open fields with light elevation gain and continuous on-course support.

Looped 5 km trail through woodland and prairie in Beaudry Provincial Park, mostly flat terrain with changing light and conditions throughout the day and night

Mountain ultramarathon along the Wasatch Front with 20,869 feet of vertical gain, rugged singletrack, exposed ridges, and scenic canyon trails

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

Frontier-style course across rail beds, gravel, forest trails, and prairie; remote sections, encounters with wildlife, night running, and long cutoffs

Big mountain ultra in Portugal’s Estrela Mountains, with 100-mile and 103 km routes through alpine scenery, rugged terrain and villages.

Trail routes across forested hills, limestone rock formations, desert landscapes, and castle ruins in the Krakow-Częstochowa Jura; ITRA and UTMB INDEX points

Self-supported multi-day route over Renjo La, Cho La and Kongma La, with remote trails, thin air and rugged high-altitude Himalayan terrain.