The largest unsanctioned boat race happens every August on Lake of the Ozarks. More than 75,000 people show up to watch powerboats hit speeds up to 208 miles per hour. The all-day party scene includes 100-boat flotillas, tied together, with coolers of Coors barely outnumbering the bikini-clad co-eds dancing deck to deck. NASCAR brothers Rusty and Kenny Wallace spent childhood summers in their father Russ's boats as he challenged other bare-chested dads at 100-plus miles per hour. "My dad was a real badass," says Rusty. At sunset, the far-end Bagnell Dam strip serves as open-air concrete dance floor.