Oh, well, compared to the others here, mine is kind of embarrassing. My deepest dive was probably the 20-25' lake that was used for my checkout dive. It kind of soured me on the whole dive thing, since my instructor failed me for taking to long to clear my mask, but passed the diver that started to bolt for the surface and he actually had to grab his leg. I've often thought about trying again, but haven't. I want to get into underwater photography which is probably what will get me to give it another go someday.