I don't know CRR...We were in Calgary in October and enjoyed much of the visit in just a long sleeve shirt and a pair of jeans. I know the winters can be brutal, but from what I have been told by my new son-in-law, who is from Calgary, the Chinook winds warm things up once or twice a month to springtime temperatures. I am not sure where exactly the oil sands are, but from Calgary to the middle of Banff is only an hour away, so the city can't be that far away from the oil fields.
Outaservice is right, there are a ton of jobs in Calgary and not all of them have to be in oil. There is a lot of work that pays extremely well as a byproduct of the oil business. Calgary is growing by leaps and bounds. Construction jobs are paying six figures. I have been told that if you work at a McDonalds, or similar fast food place, the wages are about $15.00 an hour. The downside? Housing is very expensive and crammed together in developments that all look the same. Nice houses, but small yards and generic looking neighborhoods. Taxes are brutal as well. Beautiful place, though. Stunning beauty in the Rockies.