US 89 north from Saint Mary, MT, left onto Montana 17, continue to border -- becomes Canada (Alberta) 6. Left at entrance to park. Left at entrance to Prince of Wales hotel.
Nikon D610, Nikkor 28-300G @ 54mm, f16 @25 seconds, polarizer, Manfrotto MKBFRC4 tripod
Most photos feature the Prince of Wales hotel. This is what you see from the back lawn as darkness falls across the Rockies -- the meeting of water, mountains and sky. The Waterton marina is in the lower right.