| Northwest Great Basin Ranges | Level 4 (Parent) |
|          South-Central Oregon Ranges | Level 5 (Sibling) |
|          Modoc-Lassen Plateau | Level 5 (Sibling) |
|          Warner Mountains | Level 5 (Sibling) |
|          Sheldon-Hart Mountain Refuges Area | Level 5 (Sibling) |
|          Black Rock Desert Area | Level 5 (Sibling) |
|          Steens Mountain Area | Level 5 (Sibling) |
|          Trout Creek Area | Level 5 (Sibling) |
|          Pyramid Lake Area | Level 5 (Sibling) |
|          Northwest Humboldt River Area | Level 5 |
|                  Slumbering Hills | Level 6 (Child) |
|                  Eugene Mountains | Level 6 (Child) |
|                  Antelope Range | Level 6 (Child) |
|                  Majuba Mountains | Level 6 (Child) |
|                  Poker Brown Mountains | Level 6 (Child) |
|                  Seven Troughs Range | Level 6 (Child) |
|                  Trinity Range | Level 6 (Child) |
|                  Blue Wing Mountains | Level 6 (Child) |
|                  Sahwave Mountains | Level 6 (Child) |
|                  Nightingale Mountains | Level 6 (Child) |
|          Reno-Truckee Area | Level 5 (Sibling) |