Scenic Caves, Blue Mountain and Collingwood
Drive north from Toronto to the top of the Niagara Escarpment above Georgian Bay: scramble through the crevasses and cross the long suspension bridge at Scenic Caves, ride the Open-Air Gondola at Blue Mountain, look for 450-million-year-old fossils on Craigleith's shale shore, and end the day at Collingwood's harbour and old main street.
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From mid-September to mid-October, Collingwood usually sees highs around 20 °C (68 °F) at the start of the window, falling to about 12–14 °C (54–57 °F) by mid-October, with nights around 10 °C (50 °F) falling to 3–5 °C (37–41 °F). Showers blow in off Georgian Bay, and wind on the escarpment, the suspension bridge and the open gondola makes it feel colder than the forecast. The forest on the escarpment usually turns from late September through mid-October. These are seasonal expectations, not a forecast for your travel date; check the Environment and Climate Change Canada forecast the evening before and the morning of your trip.
Admission and parking are separate. Check current conditions before departure.
Drive from Toronto to the brink of the Horseshoe Falls, ride the boat into the mist, then follow the Niagara Parkway north past the Floral Clock and Queenston Heights to the Victorian main street of Niagara-on-the-Lake and the War of 1812 ramparts of Fort George.
A car-free summer day in downtown Toronto: breakfast at St. Lawrence Market, the city ferry to Centre Island, a lakeside boardwalk walk to the beach and cottages of Ward's Island, back across the harbour to Harbourfront Centre and Queens Quay, and dinner on the brick lanes of the Distillery District.
A market-day loop west of Toronto: Canada's largest year-round farmers' market at St. Jacobs, lunch in the Mennonite-country village, the 22 m (72 ft) limestone gorge of the Grand River at Elora Gorge Conservation Area, then the stone streets of Elora and Fergus before the drive home.
Drive from Toronto to Stratford for a morning on the Avon River and in the Shakespearean Gardens, lunch downtown, and a 1:30 pm matinee at the Stratford Festival, then end the day in the limestone town of St. Marys with a walk over the high Sarnia Bridge and dinner before the drive home.
Two nights in Prince Edward County, the island of farms, vineyards and small towns on Lake Ontario, about 2½ hours east of Toronto: sunset at Wellington, a morning on the sand dunes and beaches of Sandbanks Provincial Park, an afternoon of tastings along Closson Road, then Lake on the Mountain and the free Glenora Ferry on the way home.
A fall-colour weekend from Toronto: the Muskoka Wharf in Gravenhurst and Lions Lookout over Huntsville on Friday, a full day on Algonquin Park's Highway 60 corridor with the Lookout Trail, the Visitor Centre deck and the Track and Tower Trail on Saturday, then the Dorset Scenic Lookout Tower, the Lake of Bays shore and Bracebridge Falls on Sunday.
Drive from Toronto to Canada's capital for two nights: an evening walk past the Rideau Canal locks to dinner in the ByWard Market, a free House of Commons tour at West Block while Centre Block is closed for rehabilitation, the National Gallery and a canal cruise, then the Canadian Museum of History and Gatineau Park's Pink Lake and Champlain Lookout across the river in Québec.