Napa Valley Adventure Boot Camp, Sonoma

Fitness Revolution owner Jeff Larson and his team of trainers know all about breaking a sweat. Each day, they challenge their students with fitness classes that string cardio and resistance workouts into a challenging chain of intense exercise. They also understand that water and electronics don't mix—instead of hosting their classes inside gyms filled with treadmills and stationary bikes, they stage their regimens, fortifying their workouts with rejuvenating sunrays and the encouraging shrieks of onlooking robins.