Raff, I'm looking at GemTrek map of the area. Looks like you took Gorge Creek Trail to near Threepoint Mountain CG. There is no trail shown on the map that can take you from there to the pass between Bluerock Mnt and Mt. Rose. I guess you followed game paths or abandoned trails. If I remember correctly G. Daffern describes North Ridge route in her earlier editions of "Kananaskis Trail Guide", which is similar to the one you took.
You can approach South Ridge on bike too. Bluerock Creek Trail is easy to cycle on as far as the Creek crossing despite occasional windblown trees, which means effectively shaving off 3-3.5km each way. The trail goes too steep and has too much deadfall after that to offer an enjoyable ride to all but the most hardcore cyclists.