Depends on your skill level and how fit you are.
This from Nokimis trail in Lake Superior P.P.https://goo.gl/photos/7ZKEweWMW9cWzYFU6
There are many harder and some overnighters.
And the view from Neys to a Lawren Harris location, stunning at sun set.
and you have not even touched Killarney yet 🙂
Mono Cliffs, a day use park, is close to Tronto and offers the most interesting shorter hikes around.
I love Algonquin Park! Even if you are not camping there are still plenty of trails and beautiful sites to see! One of my favprite parks in Ontario!
There are some really great hikes at sleeping giant provincial park! There are many to choose from, so you can pick to suit your skill level. I highly recommend the hike to the top of the sleeping giant, the views are amazing!
The Cup and Saucer on Manitoulin Island is a great one and you can find many beautiful trails at Killarney Provincial Park.
Make sure to do your our research on the trail you are about to attempt. There are many skill levels available for your enjoyment.