Lady McDonald. Depending on which way you go, multiple levels of fitness levels. I always hiked up to the "point" up there, in my teens. Would also hike up to where the tea house is now and then hang glide off that spot!
Also, the 3 sisters is an awesome hike.
http://www.trailpeak.com/trail-Three...nmore-AB-10250
Check out this site for lots of info.
https://www.alltrails.com/trail/cana...teahouse-trail