| Bailey | 1760 m | | South Okanogan Highlands |
| Bimetalic | 1504 m | | South Okanogan Highlands |
| Alta | 1902 m | | Chikamin-Keechelus |
| Bell | 833 m | | Southern Olympic Mountains |
| Blowout | 1737 m | | Central South Cascade Crest |
| Big Skidder Hill | 646 m | | Constance-Buckhorn Group |
| Bradeen Hill | 1114 m | | Huckleberry |
| Baird | 811 m | | Сент-Хеленс |
| Buck Mountain | | | Сан-Хуан |
| Blacktail | 1294 m | | Central Washington Selkirks |
| Brunner Hill | | | Columbia Gorge North |
| Allen | 1551 m | | Southwest Mount Rainier Area |
| Blue Buck | 1895 m | | Loup Loup Area |
| Bodie | 1718 m | | South Okanogan Highlands |
| Boundary Butte | 1228 m | | Huckleberry |
| Bare | 1632 m | | North-Middle Forks Snoqualmie |
| Bigler | 773 m | | Northwest Olympics |
| Aeneas | 1563 m | | South Okanogan Highlands |
| Black Butte | 1261 m | | North Wallowa Foothills |
| Bobs | 643 m | | Columbia Gorge North |