ZenTriathlon, the owner and host of the first, best and longest running triathlon podcast Zen And The Art Of Triathlon, swam about 36 km across Lake Tahoe (from south to north) last weekend in 13.5 hours.
That's almost ten times the Ironman swim leg and about the same distance as a straight-line English Channel swim would be. At almost 2K altitude.
ZenTriathlon swam with ultraswimmer Jamie Patrick. Very very cool - obviously, as I don't think the water was much warmer than 17 C!