KitCMC They go all the way up to the North Slope. They usually take rests around my neck of the woods and then go up to near Fairbanks & Delta Junction (lots of open fields there) before heading to their nesting areas. It is really amazing how far they fly and how they manage to do it given their size. They go up to 10,000 feet or so and then coast down until they need to climb again.
The pair that has been hanging around my cabin for a week or so now is quite comical. Tonight I watched the male repeatedly toss leaves in the air and jump up and down to impress his lady. She was standing on top of one of the remaining mountains of snow and was decidedly unimpressed. I could just hear her saying " Dammit George! I told you we were heading North too early! My feet are cold!" 😁