Blea Water

{{Short description| A mountain lake in Cumbria, England}}

{{Use British English|date=August 2020}}

{{Use dmy dates|date=August 2020}}

{{Infobox body of water

| name = Blea Water

| image = Blea Water.JPG

| caption = Blea Water viewed from above

| alt = A lake in the hollow of a mountain top

| image_bathymetry =

| caption_bathymetry =

| pushpin_map = United Kingdom Lake District#United Kingdom Eden

| pushpin_map_caption = Location in the Lake District National Park##Location in Eden, Cumbria

| location = England

| coords = {{coord|54|29|20|N|2|51|10|W|region:GB_type:waterbody|display=inline,title}}

| type = glacial lake

| inflow =

| outflow =

| catchment =

| basin_countries = United Kingdom

| length =

| width =

| area =

| depth =

| max-depth = {{convert|206|ft|abbr=on}}

| volume =

| residence_time =

| shore =

| elevation = {{convert|1550|ft|abbr=on}} approx.{{cite map|title=Ordnance Survey: Tourist Map 3 Lake district|ISBN= 0-319-25003-2 |publisher=Ordnance Survey|date=1983}}

| islands =

| cities =

}}

Blea Water is a tarn or corrie lake which occupies a glacially excavated hollow immediately to the east of High Street in the Lake District, England. At just over {{convert| 200|ft}} deep, it is the deepest tarn in the Lake District.

It is drained by the Mardale Beck, which runs north-east into Haweswater.