| North Cascades | Level 4 (Parent) |
|          Far Northern Cascade Range | Level 5 (Sibling) |
|          Skagit Range | Level 5 (Sibling) |
|          Hozameen Range | Level 5 (Sibling) |
|          Okanogan Range | Level 5 |
|                  North Okanogan Range | Level 6 (Child) |
|                  North Washington Pass | Level 6 (Child) |
|                  Central Pasayten Area | Level 6 (Child) |
|                  Cathedral Range | Level 6 (Child) |
|                  Snowy-Windy-Chopaka | Level 6 (Child) |
|                  Tiffany Range | Level 6 (Child) |
|                  Aeneas-Palmer Area | Level 6 (Child) |
|                  Loup Loup Area | Level 6 (Child) |
|          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) |