Barrel Spring is located at the head of its 570 foot run. The mouth of the run is on the west side of the river approximately 3.52 miles north of the Hollis Creek boat ramp. Approximately 25 feet before the Chipola River the run disappears into a swallet and resurges from the limestone bank next to the Chipola River. Ground water enters the 25 foot diameter pool through a large area of diffuse inflow in the bottom. There is no surface boil and the vent is crossed by many trees and branches. The vent is on private property.