Langdon Lake

{{for|the lake in Minnesota|Lake Langdon}}

{{Use mdy dates|date=February 2025}}

{{Infobox body of water

| name = Langdon Lake

| image = Langdon Lake, Tollgate, Oregon.jpg

| caption = Langdon Lake with part of Tollgate on the far bank.

| image_bathymetry =

| caption_bathymetry =

| location = Umatilla National Forest, Umatilla County, Oregon, US

| coords = {{coord|45.77819|-118.08606|region:US-OR_type:waterbody_source:gnis-1155593_elevation:1494|display=inline,title}}

{{cite gnis

|id=1155593

|name=Langdon Lake

|entrydate=May 22, 1986

|accessdate=December 17, 2009}}

| type = Reservoir

| inflow = Morning Creek

| outflow = Lookingglass Creek

| catchment =

| basin_countries = United States

| length =

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| shore =

| elevation = {{convert|4902|ft|m|abbr=on}}

| islands =

| cities = Tollgate

| pushpin_map = Oregon#USA

| pushpin_label_position =

| pushpin_map_alt = Location of Langdon Lake in Oregon, USA.

| pushpin_map_caption =

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Langdon Lake is reservoir located in the Umatilla National Forest of Northeastern Oregon, United States.

{{cite web

|url=http://www.fs.fed.us/r6/uma/recreation/campgrounds/walla-cg.shtml#woodland

|title=Walla Walla District Campgrounds

|publisher=United States Forest Service

|accessdate=December 16, 2009}}

It is an impoundment of Morning Creek,

{{cite web

|url=http://www.trails.com/topo_beta.aspx?lat=45.77819&lon=-118.08606&s=25&size=s

|title=Tollgate Topo Map at Lat 45.7782°N Long -118.0861°W Zoom 15 S Size

|publisher=Trails.com

|accessdate=December 16, 2009}}

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.