Dirty German 25K

Dirty German 25K is a 25 kilometre trail race held in Philadelphia, United States, in May. It is set in Pennypack Park, with the start at the Pine Road entry.

The distance is a single lap of the park's trail system, and the organiser pitches it as a gentle first step into trail ultrarunning because the surface is quick and runnable throughout. Underfoot, the route mixes soft ground beside the creek, smooth single-track and broader gravel paths. About a mile of each lap follows a paved cycle path.

The twisty single-track section known as the Rollercoaster is the most playful stretch. Hills do appear, but they are short, so the effort stays steady. Afterwards the event leans into a German theme, with traditional food and live accordion music.