There's plenty to do in Toronto.  This page describes sports events you can watch and physical activities you can participate in.  You may also be interested in visiting museums & attractions, shopping, or exploring neighbourhoods.

The Toronto Islands are just a ferry ride from the Toronto Harbourfont.  The island's facilities include volleyball courts, tennis courts, cycling, bicycle and boat rentals, wading pools, baseball diamonds, an amusement park, a frisbee golf course, picnic areas, and a supervised beach.  It's a great place to spend your day, and a great place to take kids.

At the Rogers Centre (formerly SkyDome), right next to the CN Tower, you can catch a Blue Jays baseball game from April to early October, or just walk around the massive stadium.  Rogers Centre is also home to the Canadian Football League's Toronto Argonauts from late June to early November.

A few blocks away at the Air Canada Centre (ACC), you'll find the Toronto Raptors (NBA basketball, November to May) and the Toronto Rock (lacrosse, late December to April; officially lacrosse is Canada's co-national sport along with hockey).  Canada's most popular sport, though, is hockey, and the ACC is home to the NHL's Toronto Maple Leafs from October through April; playoff games can run as late as June.

Because Leafs games are almost always sold out, getting tickets to a hockey game during your time in Toronto can be a bit tricky.  Check out "How can I get hockey tickets?" from the TripAdvisor Toronto forum.

The city's newest major sports team is Toronto FC (Major League Soccer, runs April to November), which plays at BMO Field at Exhibition Place.