North Sonoran Desert Ranges | Level 4 (Parent) |
         Kofa Area | Level 5 |
                 Dome Rock Mountains | Level 6 (Child) |
                 Plomosa Mountains | Level 6 (Child) |
                 New Water Mountains | Level 6 (Child) |
                 Trigo Mountains | Level 6 (Child) |
                 Chocolate Mountains | Level 6 (Child) |
                 Kofa Mountains | Level 6 (Child) |
                 Little Horn Mountains | Level 6 (Child) |
                 Tank Mountains | Level 6 (Child) |
                 Castle Dome Mountains | Level 6 (Child) |
                 Muggins Mountains | Level 6 (Child) |
         Harquahala Area | Level 5 (Sibling) |
         Cabeza Prieta Area | Level 5 (Sibling) |
         Organ Pipe Area | Level 5 (Sibling) |
         Maricopa Area | Level 5 (Sibling) |
         South Phoenix Area | Level 5 (Sibling) |
         Baboquivari Area | Level 5 (Sibling) |
         La Lesna Area | Level 5 (Sibling) |
         San Luis Area | Level 5 (Sibling) |
         West Tucson-Nogales Area | Level 5 (Sibling) |