North Cascades | Level 4 (Parent) |
         Far Northern Cascade Range | Level 5 |
                 Nicoamen Plateau | Level 6 (Child) |
                 Stoyoma-Lytton Area | Level 6 (Child) |
                 Anderson River Group | Level 6 (Child) |
                 Mount Thynne Area | Level 6 (Child) |
                 North Hope Mountains | Level 6 (Child) |
         Skagit Range | Level 5 (Sibling) |
         Hozameen Range | Level 5 (Sibling) |
         Okanogan Range | Level 5 (Sibling) |
         Mountain Loop Area | Level 5 (Sibling) |
         Central North Cascades | Level 5 (Sibling) |
         Methow Mountains | Level 5 (Sibling) |
         Glacier Peak-North Stevens Pass Area | Level 5 (Sibling) |
         Entiat Mountains | Level 5 (Sibling) |
         Chelan Mountains | Level 5 (Sibling) |