Thoroughfare Gap Battlefield is a historic American Civil War battlefield located at Thoroughfare Gap, Broad Run, Prince William County, Virginia. It was the site of the Battle of Thoroughfare Gap. The property includes a number of resources present at the time of the battle including the separately listed Beverley Mill, a five-story, coursed-rubble stone building set into the north side of Thoroughfare Gap. Meadowlands, the Chapman's house and the second Upper Mill are clearly visible on the landscape, as well as an important ice pit and a walled cemetery associated with the Chapman family.