| 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) |