The south summit is a straight up difficult scramble, not to be confused with the north summit's ease if in fact the highest point is your objective. I reached the south summit in 3.5 hours from the road moving at a fast clip. I did the full traverse from the TransCanada to Emerald Lake. You will need a shuttle or hitch back to your car. I recommend doing both summits to make this is a 5-star day. Cheers.