| Forbidden Glacier | |
| Type: | Mountain glacier |
| Location: | North Cascades National Park, Skagit County, Washington, U.S. |
| Map: | USA Washington |
| Label Position: | right |
| Map Size: | 225 |
| Coordinates: | 48.5175°N -121.0622°W |
| Coordinates Ref: | [1] |
| Length: | 0.75miles |
| Terminus: | Icefall/barren rock |
| Status: | Retreating |
Forbidden Glacier is on the north slopes of Forbidden Peak, North Cascades National Park in the U.S. state of Washington.[2] The glacier is approximately 0.75miles in length, 1miles in width at its terminus and descends from 8000feetto5600feetft (toft). The glacier is separated by an arête from Boston Glacier to the east and south. Meltwaters from Forbidden Glacier flow into Moraine Lake.