Three days is the sweet spot for Muskoka. It is long enough to see the lakes, a waterfall, a museum and a stretch of Algonquin, and short enough that you are not driving more than an hour or so between stops. The plan below moves north with the highway, so you check out of nothing and backtrack very little. A car is essential, and each day has a seasonal swap, because many of Muskoka's best-known sights open only in the warm months.
Day one: Gravenhurst and Bracebridge
Start at the wharf in Gravenhurst, which is the first big Muskoka town heading north from Toronto. In the sailing season, a cruise on the Muskoka Steamships is the classic opener, and the Muskoka Discovery Centre next door tells the story of the lakes and the steamships in a couple of hours. Walk into town for Bethune Memorial House in the months it is open. After lunch, drive north to Bracebridge for the downtown falls, then take a short walk along the river. If you like craft beer, end the afternoon on the patio at Muskoka Brewery, and keep a sunset stop on the lakes if you have the energy. Sleep in Bracebridge or on Lake Muskoka.
Day two: Huntsville and the northern forests
Huntsville is the base for the northern half of the region and has more to do than first appears. Start with the Group of Seven outdoor gallery, where the murals are on brick walls along the downtown streets and the route takes about an hour on foot. Visit Muskoka Heritage Place for the museum, and in season the pioneer village and the little Portage Flyer train. In the afternoon, choose between the forest trails of the Limberlost reserve, which are free with a safety waiver, and Arrowhead Provincial Park, where there is a lake to swim in during summer and a skating trail in midwinter. Have dinner in town, and sleep in Huntsville or on Peninsula Lake.
Day three: the Algonquin corridor
Drive east along Highway 60 and give the day to Algonquin Provincial Park. Buy the day-use vehicle permit online beforehand, since it cannot be bought in person, and fill the fuel tank before you enter. Stop at Ragged Falls on the way, then choose two or three short trails, such as a lookout loop and a beaver pond walk, and linger at the visitor centre. If you would rather not drive, a guided day tour from Toronto is the alternative, though it makes the trip a Toronto day rather than a Muskoka stay. In fall, add the Dorset Lookout Tower on the return, as the colour above Lake of Bays is among the best views in the region.
Seasonal swaps
In summer, add a lake cruise, a swim and a lake-view dinner, and consider replacing Day two's forest walk with a paddle. In fall, put the lookouts first and start early, because the colour weekends are busy. In winter, replace the cruise and the village with the Discovery Centre, a skate or snowshoe at Arrowhead and a night at a lakeside inn, and check opening days before you go, because many seasonal sights close from late October to May. In spring, expect mud and black flies on trails, and favour waterfalls, which are at their fullest after the melt.
Where to sleep
For a three-day loop, Bracebridge is the easiest single base, because it is central and has the widest choice of restaurants. If you would rather have two bases, spend the first night in Gravenhurst or Bracebridge and the second in Huntsville, which shortens the Algonquin day. Couples looking for a treat can swap one night for a lakeside resort on Lake Rosseau, while families may prefer a simple town hotel with room to spread out.
Time budget
Allow about two hours between breakfast and lunch for each main sight, and leave a slack hour each day, because small-town service is slower than city service and photo stops multiply. Distances between towns are modest, with Gravenhurst to Bracebridge and Bracebridge to Huntsville each taking roughly thirty minutes in good conditions, but side roads and lake villages add time. Daylight is short in late fall and winter, so start early.
Honest cautions
Hours change, many seasonal businesses close between late October and May, and weather can turn quickly, so check each venue's own page the day before. Do not try to fit in every sight, because Muskoka rewards unhurried days. If you must cut one thing, cut the second stop on any day, and spend the time on a longer walk or a longer lunch instead.