Crumbly Spring is located approximately 160 feet up the Barrel Spring run, the mouth of which is on the west side of the river approximately 3.52 miles north of the Hollis Creek boat ramp. There is a small vent with a surface boil and several lateral discharge areas from a partially collapsed limestone wall. The pool is approximately five feet in diameter and discharges in two directions, into the Barrel Spring run and directly into the Chipola river. The spring is on private property.