A woman was not hurt when she lost control of her Buick sedan around 4:45 p.m. and went off the road on Route 488 in Muddycreek Township.
The driver, whose name was not immediately available, was able to get out of her car unassisted, Portersville Muddycreek Township Fire Chief Tim Saunders said.
The Buick rolled about 30 feet down a hillside and hit a tree off the north side of the road near the intersection with Yellowcreek Road.
Traffic on the road was limited to one lane while emergency crews awaited tow truck.
State police investigated the accident.