PA 484 begins at an intersection with
PA 26 in
Union Township, heading east on two-lane undivided Buck Valley Road. The route winds through rural areas of woods with some farms and homes, curving to the northeast. The road heads through more agricultural areas, making a turn to the east. PA 484 continues through farmland with some woods and residences, turning north and then east prior to heading east and intersecting
PA 731 in Buck Valley. The route passes through Lashley prior to bending northeast and ascending forested
Sideling Hill. At the top of the hill, the road heads into
Bethel Township and descends Sideling Hill, turning east and enters wooded areas with some farms and homes and passing through Stoneybreak. PA 484 curves to the southeast and comes to an intersection with Great Cove Road that provides access to
I-70/
US 522, at which point there are a few businesses. The route continues through
Warfordsburg prior to turning east onto Piegon Cove Road and passing over I-70/US 522. PA 484 curves northeast past farms before turning east onto Stillwell Road. The route winds east across forested Cove Ridge, crossing into
Thompson Township and coming to its eastern terminus at
PA 655. ==Major intersections==