C&O Canal 100

APR

24

2027

A 100 mile ultramarathon along the C&O Canal towpath near Knoxville, Maryland, featuring one ~40 mile loop and two ~30 mile loops beside the Potomac and multiple aid stations with volunteer support.

Sat 24 Apr 2027

Knoxville, Maryland

Website

100 miles

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C&O Canal 100 : event description

The C&O Canal 100 is a 100 mile ultramarathon held near Knoxville, Maryland along the C&O Canal towpath. The course consists of one approximately 40 mile loop followed by two approximately 30 mile loops, with most miles close to the Potomac River and the Appalachian mountains. The race starts, has its halfway point, and finishes at Camp Manidokan and runs between Antietam and Brunswick, MD.

Organizers place about seven aid stations on each loop; some stations are encountered multiple times. Distances between aid stations range from 3 to 6.9 miles. The event takes place in spring conditions that organizers describe as temperate, on a course with low elevation and smooth terrain.

Participant comments included praise for volunteer support and well stocked aid stations. The event is listed as a WSER 2027 qualifier. Registration opens on January 1, 2027 at 12:00 AM ET. Visit the organization's website for the most recent information.

100 mi

100 Miler