Dove this site with my 2 boys on March 20th, 2008. If you don't have a good 4x4, don't bother trying to drive down to the water. (And I think it is too far to walk!) If you do have a 4x4, you can drive to within 20 feet of the water. There is a small shoot that floods on the surge and it makes for an easy entry & exit. The hard part is finding the exit from the water. I dragged a dive flag out 50 feet off shore and tied it off to a rock on the bottom to mark our exit point. It worked well. Many lava tubes are at about 65 feet deep at this location, all of them full of fish!