The spring water in Alexander Springs comes from several spring vents, which are clustered together beneath the surface. Alexander Springs is approximately 25 ft. deep (7.6m)
The spring basin is cone-shaped. The bottom is mostly sand, with some exposed limestone near the spring vent.
The spring pool is quite large. It is 300 ft. when measured from north to south, and 258 ft. from east to west.
There is a vertical ledge near the vent, which runs from north to south.
The water is clear and blue. There is a large spring boil on the pool surface over the vent.
Native aquatic grasses are plentiful. Thin algae patches are present on limestone substrate.
A rock wall forms the south shoreline.
There is a mixed hardwood and palm forest around the spring. Alexander Spring Run flows east approximately 8 river miles (12.9 km) until reaching the St. Johns River.
Alexander Spring is unique because it’s the only 1st magnitude spring found inside a national park or national forest.
Alexander Springs Camping, swimming, scuba diving, and canoeing are available with full facilities.