Lake St. Mary is in Glacier NP in Montana. It is my favorite national park. I believe it has the best combination of beautiful lakes, mountain vistas and wildlife of any of the parks I have visited. I love that place.
This was the view from the deck of the cabin I rented this past September - Glacier is definitely my favorite park! Have an enlarged sunset photo of Lake St. Mary's hanging in my kitchen to remind me of the beautiful spot. Love your shot.
All best wishes for 2022.