Last weekend I drove to Arethusa Cirque in Kananaskis for a quick 1.5 hour hike along the 4.5 kilometer trail. During the hike you gain 378 metres, but most of its towards the middle of the loop. Apparently the trail features a waterfall, however there was no water visible when I went. I suspect the waterfall is present only during the spring runoff.
The hike starts off through a heavily forested area, before emerging into a valley surrounded by Little Arethusa, Mount Arethusa, and Storm Mountain. You’ll then climb a few switchbacks, which gives you some outstanding views of the trees below. The trees are mostly larches, so be sure to visit on the 3rd of 4th weeks of September to get the full fall effect with the colour changes.