Mid January '21
Read on local website that 'frozen Troll Falls should be visited at least once each winter'. I've actually never been here in winter so I thought I'd see how it all looks like in different season. There are quite a few changes too compared with original post; what was once just a rudimentary trail above Troll Falls to upper Marmot Creek is now tourist highway with wood railings, switchbacks, etc. It is still very nice and well worth, if you can dodge the crowds. I went late afternoon & this paid off; had it mostly to myself. Pics tell the story:

[Raptor Lookout site by Kananaskis River; each spring lots of eagles, hawks etc can be observed here on their migratory route. G8 summits on the other side]

[Mount
Collembola from Raptor Lookout Site]

[Troll Falls; think I still prefer when
water flows and aspens above the grotto are green]

[This is why they call it "Troll Falls"]

[Upper Trail with wood railings]

[Upper falls; very neat to walk behind the sheet of ice]
Sign just above upper falls said "End of route" but broken trail continued. Following I intersected trackset Skogan Pass road & looped back to Nakiska, giving up Hummingbird Lookout extension.
Micro-spikes are a must for this few hrs excursion in winter; you will probably have better light in first part of the day, but way more solitude in the afternoon.