The Big A 50K Course
The course is composed of three 10.35 mile loops starting at the summit of Mount Agamenticus (Big A) and climbing back up the Big A and going over Second Hill and Third Hill and back up the Big A. There are opportunities to cross the finish line at approximately 10 miles and 13 miles (or any multiple of them up to 31 miles/50K). The terrain is mostly single track with some dirt road and ATV-type trails. Footing is technical with plenty of rocks, roots, and elevation changes. Trail running shoes are recommended. The full 50K has approximately 5,787 feet of elevation gain.
Course Records
- Patrick Caron 4:48 (2017)
- Lila Gaudrault  5:22 (2022)
Race Contacts
Please direct registration related question to Liz Cooper – [email protected]
For race related questions email Rich & Bob – [email protected]


Donations Needed
Did you notice registration was free? Historically this event has not had an official registration fee and instead asked for donations to benefit the Mount A Conservation Region. A minimum donation of $20 is recommended. Please reach out if you forgot to donate when registering or wish to mail in a check, as your support is vital to this event’s mission, ensuring the longevity of this trail race and greatly appreciated! 

May 06, 2023
Registration begins on 2023-01-31


Big A 50K
May 06, 2023 (Saturday) - 07:30
50 kilometers
Solo Charity/Fund raising Road
The information about this event is based on data from the official website or may be provided by the organiser. Before booking flights or accommodation check the event's website and social media. If this listing is not up-to-date, please let us know at [email protected]


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