The aircraft took off from Springbank Airport, west of Calgary about 9pm and crashed about 35 nm from Springbank just inside the Rocky Mountain Front Ranges. Sunset at Banff was 9:35 pm, so it would still have been light at the time of the crash.
The aircraft crashed on the slopes of Mt. Bogart (10,315'):
The destination was Salmon Arm, 186 nm from Springbank, so most of the flight would have been in the dark over high mountains. Not something I would care to plan.