The Allegheny 100 Challenge is an unsupported hiking event in which participants attempt 25, 50, 75, or 100 miles.
This annual event takes place on the 100-mile section of North Country National Scenic Trail through the Allegheny National Forest in Northern Pennsylvania. It it organized by volunteers of the NCTA Allegheny National Forest Chapter, in partnership with the U.S. Forest Service.
The fifteenth A-100 Hiking Challenge will be held June 12-14, 2026 and participants will travel north to south. Individuals challenge themselves to complete their chosen mileage in 50 hours. The ANF Chapter encourages participants to carefully consider mileage goals based on their fitness. Participants should also keep in mind that no transportation is provided except the shuttle from their chosen end point to the starting line.
Each year less than 25% of the participants that sign up to attempt the 100 miles reach their goal. In 2025, 179 hikers started the challenge. Only 16 hikers finished the 100-mile challenge out of 68 that attempted it and 5 finished 75 miles out of 16 that chose this challenge.
Additional Information
- A-100 FAQ
- Walk-ins: There is no waitlist, but walk-in registrants will be accepted at the start of the event. Walk-ins need to pay the event fee in cash, since there will be no internet to run credit cards. Walk-ins are also responsible for their own transportation; they will not be able to take the shuttle and they are not guaranteed event swag.
- Trailhead Parking: In 2026, the challenge will run north to south.
- Waiver: A completed waiver form must be submitted at check-in.
- Participant Age: Those younger than 18 years old by the first day of the challenge must hike with an adult (18 or older). Minors must provide that adult’s name at the time of registration, and the event waiver must be signed by a parent or guardian.
