By Pat Sisson and Nicole Turec Rauner

It's easy to have a good time at a summer festival. Combine cold beer, pretty girls, classic rock and beautiful weather, and most guys would consider themselves pretty content.

But to qualify as one of Playboy.com's 10 best summer festivals, we set the bar a little higher. These events aren't merely a good time. After all, you don't go to the trouble and expense of traveling across country just for a "good time." You want to have an unforgettable time, the kind of experience that will make your office buddies groan with jealousy when you tell tales upon your return.

We sifted through hundreds of music, sports, cultural, car and motorcycle festivals to find the ultimate stops for summer fun, thrills, tunes, girls and sophistication. Whether you want to get bets down on thoroughbreds at the race track where Seabiscuit got "discovered" in 1936, ride to Mt. Rushmore on your Harley, catch hardcore legends Bad Brains at one of America's most beautiful music venues, get pasta lessons from a gorgeous celebrity chef like Food Network's Giada de Laurentiis or watch sexy surfer babes in their X Games inaugural runs, we've got the lowdown.

From million-dollar classic cars to a Big Easy cocktail bash, from the Playboy Jazz Festival to the Police, here are America's best summer festivals for 2007.