Eco Region Assessment 38. Geologically, this ecoregion is composed of moraine, glaciolucustrine, and outwash deposits created over time by periods of continental glaciation and the numerous mountain glaciers to the west. With frequent Chinook winds moderating the cold temperatures, winter is milder here than in most areas in the Rocky Mountain region making it highly desired as winter range for wildlife.
Summers are typically dry and warm.
Natural disturbance is predominantly fire and drought.