Finger Lakes 50S

JUL
4
2026
Trail ultramarathon in the Finger Lakes National Forest offering 25K, 50K and 50 mile options on a 16.5 mile loop. The course features singletrack, grassy pastures with cows, dirt roads, about 1,300 feet of climb per loop and six aid stations.
Sat 4 Jul 2026
50 miles 50 kilometers 25 kilometers

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Finger Lakes 50s

The Finger Lakes 50s is a trail ultramarathon held in the Finger Lakes National Forest near Hector, NY. The event offers three distances that use the same loop course and start and finish at the Potomac Group Campground.

Distances:

  • 25K (approximately 16.5 miles)
  • 50K (approximately 33 miles)
  • 50 mile

The course is a 16.5 mile loop composed mostly of singletrack (about 85%), with grassy pastures that may contain grazing cows and cow pies, and dirt roads. Each loop includes roughly 1,300 feet of elevation gain. Fifty mile runners complete three full loops plus a short extra loop to reach the full distance. Runners pass six aid station stops per loop.

Course markings use blue arrows on white signs and pink flagging; other trail blazes should be ignored. The route includes boardwalks that can be slippery and broken, and sections with two-way traffic where runners should keep to the right. There are time cutoffs for continuing to longer distances; failing to meet cutoffs can change a finish to a shorter distance or result in a DNF.

Key policies include a prohibition on in-ear or over-the-ear headphones (bone-conducting headsets are permitted), a strict no littering rule, visible bibs with timing devices, and no bandit runners. Pacers are allowed only for 50 mile runners on the third loop and the final short loop; pacers must register, be at least 18 years old, and may not carry items for the runner. Parking is limited to the west side of Potomac Road and camping at race headquarters is offered free for event participants. Visit the organization's website for the most recent information.

50 mi
50 Miles
50 km
50k
25 km
25k

Events nearby

A community 5K and 10K on the Keuka Outlet Trail in Penn Yan with start and finish at Cascade Falls. Courses pass Seneca Mills Falls and the 10K reaches the former Fox Mills site; shirts and medals included.
A 5.5 mile prediction run in Ithaca on mixed pavement and trail terrain where runners estimate their finish time while supporting Loaves and Fishes.
Trail ultramarathon at Robert Treman State Park offering 50 mile and 50 kilometer courses through singletrack, waterfalls and stone stairs with aid stations and drop bag support.
Trail race at Robert Treman State Park offering 5K, 10K and a 13.2 mile half that loops through Lucifer Falls gorge and Finger Lakes singletrack.
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