Kelowna (pop. 148,000) is the largest city in the Okanagan, and one of the fastest-growing areas in Canada. You won't have to spend much time here to understand why: The city sits astride 128km-long (79-mile) Okanagan Lake at the center of a vast fruit-, wine-, and vegetable-growing area, with lots of sun and a resort lifestyle. This is about as close to California as it gets in Canada. Kelowna is especially popular with retirees, who stream here to escape the Pacific pall of Vancouver and the winter cold of Alberta. Predictably, watersports and golf are the main leisure activities, and it's hard to imagine a better outdoor-oriented family-vacation spot.With plenty of marinas and a beautiful beachfront park that flanks downtown, you'll have no problem finding a place to get wet. In fact, Kelowna's only problem is its popularity. The greater area now has a population of 180,000. Traffic is very heavy, especially on the Okanagan Lake Floating Bridge, which simply can't handle its present traffic load.