Get the guidebook. I did not have it with me, ending up taking the wrong ridge up. And the wrong ridge down. And missed a highlight, the “Hole in the Wall”.
Taking the wrong ridge is quite common:
… It is imperative that you are at the right spot, as I went up the wrong rib on this mountain years ago and was forced to redo this route in 2005 to complete it. There are several large ribs coming down from Mount Cory. You want the eastern most rib which is identified as light-colored shaley cliffs with a deep ravine to its right.
I was elated to get to the top after 4hrs. To celebrate, I rocked out to Coldplay for a half hour, enjoying the perfect weather close to 3000m. This is rare in the Canadian Rockies, any day of the year.