North Cascades | Level 4 (Parent) |
         Far Northern Cascade Range | Level 5 (Sibling) |
         Skagit Range | Level 5 |
                 Cheam Range | Level 6 (Child) |
                 South Hope Mountains | Level 6 (Child) |
                 Hope Mountains | Level 6 (Child) |
                 Border Ranges | Level 6 (Child) |
                 Custer-Chilliwack Group | Level 6 (Child) |
                 Twin Sisters-Foothills | Level 6 (Child) |
                 Baker-Shuksan Massif | Level 6 (Child) |
                 Bacon-Blum-Triumph Area | Level 6 (Child) |
                 Picket Range | Level 6 (Child) |
         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) |