Mountain Run is a small tributary of the Rappahannock River, located in Virginia. [1] It starts and ends within the borders of Culpeper County, emptying into the Rappahannock River, which makes up the northeastern board of the county. Two reservoirs, Mountain Run Lake [2] and Pelham Reservoir, [3] are fed by Mountain Run.
38°27′1.46″N77°45′41.97″W / 38.4504056°N 77.7616583°W