The maximum depth is about 35'. The river is great for the beginner diver or the snorkeler. More recently, we snorkeled the river from a boat or a canoe. I highly recommend snorkeling. Less gear and the bottom is in reach of the average snorkeler.
Tubing is another voyage that can be taken down the river.
Take a boat or canoe up river to the headsprings or float down river from the K.P. Hole. The trip from the headsprings is much shorter. The trip down the river in a tube takes about 4 hours. So be prepared for the distance. The pick up point is located at CR 484 in Dunnellon.