Catoctin Mountain Highway (MD-77)

Maryland Route 77 runs 20.74 miles east-west through northern Maryland, ascending South Mountain before descending Catoctin Mountain along the narrow Hunting Creek valley. The road threads between Cunningham Falls State Park to the south and the National Park Service-managed Catoctin Mountain Park to the north — the same forested ridge sheltering Camp David. The highway is designated as both the Journey Through Hallowed Ground Byway and the Old Main Streets Scenic Byway, and passes through Thurmont (junction with US-15) before extending east through Rocky Ridge to Keymar. Densely forested twisties through the park corridor are the draw; fruit stands and a covered bridge punctuate the quieter eastern farmland section.