The Dam Half

Sunday, September 17, 2023 • Mifflinburg, PA • Course Map

A challenging half-marathon trail race complete with downed trees, rocks, muddy surfaces, tree stumps and roots, and wild forest creatures, the race known as The Dam Half gets its name from the dam in the center of R.B. Winter State Park where the race takes place, just outside the town of Mifflinburg in central Pennsylvania.

Open to runners only, the event welcomed more than 150 participants for the 2007 running of the race, which organizers say “is sure to leave your legs screaming for mercy” thanks to the 2,000 feet of elevation gain.

The terrain for the course is a variety of single- and double-track trails through the park and the nearby environs, and offers a daunting challenge for runners at all skill levels — but also views of the gorgeous scenery of R.B. Winter Park.

Open to visitors year-round, the 650-acre park is nestled within Pennsylvania’s Bald Eagle State Forest, and is surrounded by rocky mountain ridges as well as pine and oak forests.

Race Weather & Climate

While September weather conditions tend to be mild to even cool in the Mifflinburg area, the 2007 running of the race was “hot enough for a July day,” said the race organizers. Temperatures during the month average between 51°F and 77°F, while rainfall averages about 4.52 inches for the month.

On race day (Sept. 17), the average low temperature is 51°F and the average high temperature is 77°F.

Past Results

Course Map

See the race route map for the Dam Half here.


$67 and up


To reserve your spot in the 2023 running of Mifflinburg’s The Dam Half Trail Half Marathon, register online at here.

Official Race Website


Ever run in the Dam Half? Share your impressions here, as well as anything you learned about the race that you think other runners/walkers should know.