Cornice Lake

{{Short description|Alpine lake in the state of Idaho}}

{{Infobox body of water

| name = Cornice Lake

| image =

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| location = Custer County, Idaho

| coords = {{coord|44.052713|-114.607164|format=dms|type:waterbody_region:US-ID|display=inline,title}}

| lake_type = Glacial

| inflow =

| outflow = Little Boulder Creek to East Fork Salmon River

| part_of = Four Lakes

| catchment =

| basin_countries = United States

| length = {{convert|187|m|abbr=on}}

| width = {{convert|80|m|abbr=on}}

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| elevation = {{convert|3010|m|abbr=on}}

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| pushpin_map = Idaho#USA

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| pushpin_map_alt = Location of Cornice Lake in Idaho, USA.

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Cornice Lake is an alpine lake in Custer County, Idaho, United States, located in the White Cloud Mountains in the Sawtooth National Recreation Area. The lake is in the Four Lakes Basin and is most easily accessed from Sawtooth National Forest trail 683.Sawtooth National Forest. "Sawtooth National Forest" [map].1:126,720, 1"=2 miles. Twin Falls, Idaho: Sawtooth National Forest, United States Forest Service, 1998.

Cornice Lake is just east of Patterson Peak and west of Castle and Merriam Peaks. It is downstream of Emerald, Rock, and Glacier Lakes and upstream of Quiet, Noisy, and Baker Lakes.