This is the place you don't want to miss in summer or winter. I would recommend a visit to lake side in Summer and visit to Village side in winter.
The summer fun would be a lovely hike around the lake, canoeing, enjoying a nice barbeque and biking around the lake area, you amy even find snow for some skiing / snowboarding if ts early months of summer. While the winter fun is skiing/ snowboarding/snowshoeing in Lake Louise village, snow shoeing / cross country skiing around the hills and may be a drive around the National Park area uptill 2 lakes, but make sure its not a blizzard day, or the fun will be driving at 20 Km/h for hrs in the area with low visibility.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.