| Langdon Lake | |
| Coords: | 45.7782°N -118.0861°W[1] |
| Inflow: | Morning Creek |
| Outflow: | Lookingglass Creek |
| Basin Countries: | United States |
| Elevation: | 4902feet |
| Cities: | Tollgate |
| Pushpin Map: | Oregon#USA |
| Pushpin Map Alt: | Location of Langdon Lake in Oregon, USA. |
Langdon Lake is reservoir located in the Umatilla National Forest of Northeastern Oregon, United States.[2] It is an impoundment of Morning Creek,[3] and the source of Lookingglass Creek, a tributary of the Grande Ronde River.
Surrounding the lake is the small community of Tollgate. The lake is privately owned but a campground is nearby.[2]