Morrison Spring occupies a large, bowl-shaped depression and forms a circular spring pool with a diameter of 300 ft (91.4 m). The vent is near the center of the pool at a depth of 46 ft (14 m). The bottom is sand except near the vent where limestone is exposed. The water is light blue and slightly turbid with a prominent boil on the pool surface. However, cave divers report that the water is crystal clear in the cavern and cave system. There is abundant aquatic vegetation and very little algae.
The spring run is 150 ft (45.7 m) wide and slow-moving. It flows approximately 0.7 miles (1.1 km) southeastward into the murky Choctawhatchee River. When the river is in flood stage, river water reportedly backs up into the spring pool. On the south side of the spring run, approximately 300 ft (91.4 m) downstream from the pool, high ground meets the run’s shore and rises steeply to 15 ft (4.6 m) above the water. The spring and its run are within the western lowland floodplain of the Choctawhatchee River, in a dense gum and cypress forest. A house and picnic pavilion are east of the spring pool, and a cleared swath leads from the pavilion down to the water’s edge. Rosenau et al. (1977) report that there are 3 cavities at the bottom of the spring pool. One of those cavities reaches an eventual depth of 300 ft (91.4 m).
Morrison Spring is approximately 4.9 miles (7.9 km) southeast of Ponce de Leon. From I-10 just south of Ponce de Leon, travel 3.7 miles (6 km) south on SR 81. Turn east (left) on SR 181 and travel 1.7 miles (2.7 km). Turn south (right) on SR 181 A. Travel 0.5 miles then turn east (left) into the park.