Rex Trulove
This is Amelanchier alnifolia, commonly called either Saskatoon Serviceberry or Cusick’s Serviceberry. The bush can grow up to 15 feet tall but is usually smaller. The berries are wonderfully sweet and juicy, though. The plant is also medicinal and it has a spreading root system that is good for protecting against erosion. This plant grows throughout most of Montana.
I think I have seen this in Alaska, is that possible?
It is very possible. It grows throughout the north, including in Canada and Alaska. It is also widespread in both the Rocky Mountains and the Cascade Mountains.