A weathered trail map sign greets visitors to the Rock Hill Outdoor Center, a popular mountain biking destination along the Riverwalk in South Carolina.

An informative trailhead sign at the Rock Hill Outdoor Center displays a detailed mountain bike trail map for the Piedmont Medical Center Trail system. Color-coded routes mark easy, difficult, and most difficult paths winding through the forested grounds of the Riverwalk in Rock Hill, South Carolina. The map legend and safety guidelines welcome riders as leafless winter trees frame the scene.