JFK 50 Mile — America's Oldest Ultramarathon
The Oldest Ultra in America
The JFK 50 Mile has been running since 1963. That is not a typo. It predates Western States by 14 years, Hardrock by 28 years, and Barkley by 23 years. It is the oldest ultramarathon in the United States by a significant margin.
The race was created in response to President John F. Kennedy’s challenge to the nation to improve physical fitness — specifically his revival of a 50-mile march standard for military officers. The first edition was a true march, not a race. By 1963 it had evolved into the competitive event it is today.
The course runs from Boonsboro, Maryland to Williamsport, Maryland — a point-to-point route combining three distinct surfaces: Appalachian Trail ridgeline, C&O Canal towpath, and road.
The Three-Section Structure
Appalachian Trail (Miles 0-15.5): The race begins on the AT and immediately climbs South Mountain. Rocky, rooted, technical — standard AT terrain. The early pace here determines the race. Going too fast on the AT means arriving at the canal in pieces.
C&O Canal Towpath (Miles 15.5-41.5): Twenty-six miles of flat, hard-packed gravel towpath along the Chesapeake & Ohio Canal. This section is where JFK separates from mountain ultra into road ultra. The footing is consistent. The pace picks up. Runners who managed the AT well can fly here. Runners who went out too hard on the rocks begin to unravel.
The canal section in November can be brutally cold with a headwind off the Potomac River, or unreasonably mild and sunny. Wind matters more here than any other section because there is no shelter for 26 consecutive miles.
Road Section (Miles 41.5-50): The final 8.5 miles run on paved roads into Williamsport. This section rewards runners who have saved something. It punishes everyone else. At mile 41, legs that have spent 15 miles on technical rock and 26 miles on hard gravel meet pavement — and the transition is not comfortable.
The Field
JFK draws both ultrarunners and military competitors. The military community has deep roots in this race — active duty and veteran runners make up a significant portion of the field, many competing in boots or military-standard gear in honor of the race’s origins.
The open competitive field draws legitimate ultrarunning talent. The course record is under 5 hours — a pace that requires running faster than 6 minutes per mile for 50 miles over mixed terrain.
Hans Troyer competed at JFK 50 in November 2025 in a pre-race interview that captured the trajectory of his season.
What Makes It Notable
JFK is not the hardest ultramarathon in America by any objective measure. The elevation gain is modest. The terrain, while varied, is not technical by mountain standards.
What makes JFK significant is its history, its field diversity, and its three-surface structure that demands genuine versatility. A runner who excels on mountain terrain may fall apart on the canal. A road specialist may shred the canal and collapse on the AT.
The race is also one of the largest ultras in America by field size — over 1,000 finishers most years. The experience of running a 50-miler alongside that many people, through November in Maryland, with the weight of a 60-year history behind it, is its own kind of endurance event.
50 miles | 3,600 ft gain | Third Saturday of November | Boonsboro to Williamsport, MD | Running since 1963