Lower Kananaskis Lake is a reservoir located in the Peter Lougheed Provincial Park, just east and north of Upper Kananaskis Lake.
There are multiple access points. We used the day use area at the south end of the lake just north of Lower Lake campground. The parking lot has toilets. The lake level looked lower this year and it was a long haul to the edge of the lake (500 feet).
The edge of the lake was pretty boggy although there was a rockier shore slightly south where a creek joins the lake. There were kayakers and paddle boarders on the lake when we were there.
The lake is long (8km?) and narrow (maybe 1km?) and can sometimes be quite windy. Upper Kananaskis Lake looks to be much nicer to paddle, but that may just reflect where we chose to access the lake. There is a boat launch at the northern end of the lake by the Canyon Creek campground. The Interlakes Campground (on the west shore) also appears to have lake-side camp sites.
We actually had a better time wandering up the creek bed!
The interpretative centre for Peter Lougheed Park is worth a visit. It has washrooms, trail maps, some educational displays and a lovely lodge setting. There is also a bike path connecting the various camp grounds along the lakes, but this was closed due to bear activity while we were there.