[monkeyhatfork]

samdive -- The warm murky lake in question is lake folsom(think folsom prison) Northern california but thier are many other warm murky lakes in the area. I have the opposite(visual) problem you have, If I don't have lots of pretty stuff to look at it means too much time inside my head. Jon brought up a good point about surface conditions, in my case since I prefer the clear hight altitude spots wind is always a bigger concern than temp, on a nice glassy day its super easy but if the wind kicks up and you have to deal with a lot of chop at the surface, the thin air can drain you pretty quick, don't notice this same drain at sea level.