It includes the following level IV ecoregions :
The Mount Baker - Snoqualmie National Forest encompasses much of the North Cascades ecoregion , a Level III North American Ecoregion .
Mount Baker - Snoqualmie National Forest includes the following level IV ecoregions :
The Mount Baker - Snoqualmie National Forest encompasses much of the North Cascades ecoregion , a Level III North American Ecoregion .