I'm sure you're right, Mad Scientist. Horizon Q400 has also replaced the (sister co.) Alaska 737ng on routes to Reno, KRNO.
As an aside, I caught an airliner departing KRNO on maps.google.com .
search: 5425 Louie Ln, Reno NV
hit "Satellite View" in upper right corner of map.
Zoom in all the way.
It's an Alaska 737-900, which hasn't been on that route in a few years. Those can be old satellite views. There's no shadow under it, as it's not as close to the ground as it appears.
GB