JFK 50 Mile is a 50 miles ultra marathon in Boonsboro, United States. Distance: 80.5km. Elevation: 1,200m D+. Difficulty: moderate (Challenge Rating 27/100). DNF rate: 8%. Time limit: 14h. Surface: mixed. Established 1963.
JFK 50 Mile
Boonsboro, Maryland, United States
"America's oldest ultra. 50 miles from the Appalachian Trail to the Potomac. A November tradition since 1963."
Score Breakdown
Based on distance, vertical gain per km, terrain difficulty, weather extremes, historical DNF rate, and race format.
The oldest ultramarathon in the United States — a 50-mile journey across three terrains with deep history.
The Course
America's oldest ultramarathon. The course starts on the Appalachian Trail, transitions to the C&O Canal towpath along the Potomac River, and finishes on country roads. The AT section is rocky and technical; the towpath is flat and fast; the road finish tests tired legs.
rolling
point-to-point
10
Runner Experience
Standard aid station support with food, drinks, and basic medical assistance at regular intervals.
A legendary finish line atmosphere. JFK 50 Mile is a bucket-list race with celebrations that match its reputation.
Experience ratings are based on runner reports, race reviews, community feedback, and editorial assessment. Scenery reflects the visual quality of the course. Organization covers aid stations, logistics, and communication. Community measures the atmosphere, inclusivity, and camaraderie among runners.
Race Day Weather
5°C
-2° – 10°
55%
30%
Late November in Maryland — cold, often windy. Early morning starts in near-freezing temperatures. Afternoon warming possible.
Stats & Records
1963
900
09:30:00
05:31:46
Max King (2016)
06:17:42
Ellie Greenwood (2012)
30%
Entry
$110
March
instant
Lore & Trivia
The JFK 50 Mile is America's oldest ultramarathon — founded in 1963 after President Kennedy challenged Marine officers to meet Theodore Roosevelt's standard of a 50-mile hike in 20 hours. The race follows the Appalachian Trail over South Mountain, then the C&O Canal towpath along the Potomac River. The combination of technical mountain trail and flat canal path creates a two-character race: the first third is a mountain run, the final two-thirds is a test of mental endurance on endless flat towpath.
- ▸ Founded in 1963 in the wake of President Kennedy's challenge to Marines to complete a 50-mile hike, making it America's oldest ultramarathon.
- ▸ The course traverses three distinct terrains: rocky Appalachian Trail, flat canal towpath, and paved roads.
- ▸ With over 1,000 runners, JFK 50 is one of the largest ultramarathons in North America.
- ▸ Many road runners use JFK 50 as their entry to ultramarathons thanks to its relatively fast, forgiving course.
- ▸ Established in 1963.
JFK 50 follows the Appalachian Trail and C&O Canal Towpath — America's oldest 50-miler and still one of its best.
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Frequently Asked Questions
How long is JFK 50 Mile? +
JFK 50 Mile is a 50 miles (80.5km) ultra marathon with 1,200m of elevation gain. The course is point-to-point on mixed terrain.
How hard is JFK 50 Mile? +
JFK 50 Mile is rated moderate with a Challenge Rating of 27/100 (Moderate). The DNF rate is 8%. Runners have 14 hours to finish.
What is the weather like at JFK 50 Mile? +
Average temperature is 5°C (range -2°C to 10°C) with 55% humidity and a 30% chance of rain. Late November in Maryland — cold, often windy. Early morning starts in near-freezing temperatures. Afternoon warming possible.
Are crew and pacers allowed at JFK 50 Mile? +
Crew access is allowed. Pacers are allowed after 40km.
What is the course record for JFK 50 Mile? +
The men's course record is 05:31:46 set by Max King in 2016. The women's course record is 06:17:42 set by Ellie Greenwood in 2012.
What is the average finish time for JFK 50 Mile? +
The average finish time is 09:30:00. About 900 runners finish each year. The DNF rate is 8%.
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