Lough Feeagh

{{Short description|Lake in County Mayo, Ireland}}

{{refimprove|date=March 2020}}

{{Use dmy dates|date=November 2021}}

{{Use Irish English|date=November 2021}}

{{Infobox lake

| name = Lough Feeagh

| native_name ={{native name|ga|Loch Fíoch}}

| image = Lough Feeagh.jpg

| caption =

| image_bathymetry =

| pushpin_map = Island of Ireland

| pushpin_label_position = none

| pushpin_map_caption = Location in Ireland

| caption_bathymetry =

| location = County Mayo

| coords = {{coord|53|56|56|N|9|34|32|W|type:waterbody_region:IE|display=inline,title}}

| type = oligotrophic

| inflow =

| outflow =

| catchment = {{convert|84.68|km2|abbr=on}}

| basin_countries = Ireland

| length =

| width =

| area = {{convert|3.95|km2|abbr=on}}

| depth = {{convert|14.5|m|abbr=on}}

| max-depth = {{convert|45|m|abbr=on}}

| volume =

| residence_time = 0.47 year

| shore =

| elevation = {{convert|11|m|abbr=on}}

| frozen =

| islands =

| cities =

| reference = {{cite web | url = http://www.epa.ie/pubs/reports/research/water/Final%20Report%20(2000-FS1-M1).pdf#page=17 | title = A Reference Based Typology and Ecological Assessment System for Irish Lakes | date = 2006 | pages = 17 | publisher = Environmental Protection Agency (Ireland) | accessdate = 18 March 2020}}

}}

Lough Feeagh ({{Irish place name|Loch Fíoch}}){{cite web | url = https://www.logainm.ie/en/114296 | title = Loch Fíoch/Lough Feeagh | work = Placenames Database of Ireland (logainm.ie) | publisher = Department of Culture, Heritage and the Gaeltacht and Dublin City University | accessdate = 18 March 2020}} is a freshwater lake in County Mayo, Ireland. It is the largest of the lakes in the Burrishoole catchment, which consists of seven lakes and interconnecting rivers and streams. Lough Feeagh is one of the lakes observed and studied by the Global Lake Ecological Observatory Network (GLEON).

Lough Feeagh drains into Lough Furnace, which then drains through the short Burrishoole Channel into Clew Bay.

The remains of an Iron Age promontory fort named Leaba Dhiarmada agus Gráinne (Diarmuid and Gráinne’s bed) exists on a peninsula of land which reaches into the lake.{{fact|date=March 2024}}