Get outside your zone.
"I love mountain biking, but especially out west in the Santa Monica Mountains near the ocean around Malibu," McEnroe says. Indeed, the Santa Monicas offer several dozen trails of single track and fire road that suit every ability. "I'll go on a two-hour ride or so. It's difficult going up, but when you reach that peak the views make it all worthwhile – it's extremely beautiful and calming for me." Just remember to keep tabs on wildfire notices (and that you're in rattlesnake country).