It would take a lifetime to explore Ontario's Algonquin Provincial Parkthe area, three hours north of Toronto, has 1,500 lakes and nearly two million acres of forest. But since you don't have that kind of time, head directly for the park's remote western portion. The easy way to explore: Let Algonquin Outfitters design a guided canoeing-and-hiking trip based on your preferences (US$75 per person per day, plus a $200 daily guide fee; algonquinoutfitters.com). The more interesting method: Score an entry permit through the park's Web site for access point 3, on Algonquin's western edge (US$11; ontarioparks.com), and paddle and portage eight miles to Little Trout Lake. Pick one of the lake's two islands, throw up your tent, and go Tom Sawyer underneath towering white pines. Algonquin Outfitters will set you up with a canoe rental, plus food and all the requisite camping gear (from $65 per person per day).