There are many things to do in Killarney Park. To get yourself familiar with the beautiful scenery, you can: Drive to sunset rock (site 77) whereby there is a little path between site 77 and site 78 that you can walk through to the rock - incredible view. Hike the granite ridge trail. Its only 1 to 1.5 hours long and my kids did it when they were 3 or 4 but it offers one of the best views for the effort anywhere in Canada - beautiful vistas of Georgian Bay on the one side and a few of the Lacloche mountain range on the other side. Hike the Crack Trail (if you are more ambitious). This is a challenge 4 hour round trip trail about 8 km back out on Hwy 637 (you should talk to someone about the trail to get a map / guide or something else.