Running the full length of the property, Marl Creek is the source of water for the mill's water wheel. It lets out at the south end of the property into the larger South River which flows along the Shenandoah Valley. Massive stone boulders line the edge of the creek, with drops in elevation creating several small waterfalls. The north end of the property features a small bridge where you can sit over the creek as the water rushes under your feet.
Osceola Mill features a quarter-mile walking path along Marl Creek. This is the perfect spot for a peaceful morning or evening stroll.