Madison Blue has one major outlet. This is where divers enter the system. It has a large cavern and high flow. The cave starts at the back of the cavern and is relatively low profile for some distance. Average depth in the cave is between 60 and 80 ft deep.

This is a public park, and the current park ranger is very talkative. Be warned, he may suck you into a long conversation even though you just want to dive.