Rockymountain
Pre-takeoff checklist
@AlphaMike: Interesting that your pitot tube had ice on it. Was it working? Looking at that picture, you were close to something bad happening, just no way of knowing how close. That is a lot of mixed ice, and the effect of ice is never the same 2 times on an airframe. Good call on getting out of it, but just realize that was a close one, and don't use past performance to predict future outcomes. That amount of ice on a non-deiced airframe would scare the bejesus out of me.