Taylor Lake
Taylor Lake is an out and back trail in Banff national park, a bit south of Lake Louise. About 14km round trip, much if it is fairly steep and heavily wooded (something common in the Bow Valley), so there aren't many photos from the ascent, but at the top is a beautiful lake, and a short walk to Panorama Meadow, which, like its name implies, has some gorgeous panoramic views.
(also, it was really really cold)