Mount La Perouse

{{Short description|Glaciated mountain summit in Alaska, US}}

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

{{Infobox mountain

| name = Mount La Perouse

| photo = Mount La Perouse.png

| photo_caption = Mount La Perouse, east aspect

| elevation_ft = 10728

| elevation_ref = {{cite peakbagger|pid=597|name=Mount La Perouse, Alaska|access-date=2020-01-22}}

| prominence_ft = 2778

| prominence_ref=

| isolation_mi = 7.07

| isolation_ref ={{cite web|url=https://listsofjohn.com/peak/33077|title=La Perouse, Mount - 10,728' AK|website=listsofjohn.com|access-date=2024-04-04}}

| range = Fairweather Range
Saint Elias Mountains

| parent_peak = Mount Crillon (12,726 ft)

| part_type = Protected area | part = Glacier Bay National Park

| country = United States

| state = Alaska

| region = Hoonah–Angoon

| region_type = Census Area

| map = USA Alaska

| map_caption = Location in Alaska

| label_position = left

| mapframe = yes

| mapframe-zoom = 8

| mapframe-caption = Interactive map of Mount La Perouse

| coordinates = {{coord|58|33|46|N|137|04|57|W|type:mountain_region:US-AK_scale:100000|format=dms|display=inline,title}}

| coordinates_ref =

| topo = USGS Mount Fairweather C-4

| rock = Gabbro

| first_ascent = 1952

| easiest_route = Mountaineering

}}

Mount La Perouse is a {{convert|10728|ft|m|adj=on}} glaciated mountain summit located in the Fairweather Range of the Saint Elias Mountains, in southeast Alaska, United States. The peak is situated in Glacier Bay National Park, {{convert|4|mi|km|0|abbr=on}} southeast of Mount Dagelet, {{convert|7.6|mi|km|0|abbr=on}} south-southeast of Mount Crillon which is the nearest higher peak, and {{convert|28.6|mi|km|0|abbr=on}} southeast of Mount Fairweather, which is the highest peak in the Fairweather Range. Topographic relief is significant as the mountain rises up from tidewater in less than nine miles. The mountain was named in 1874 by William Healey Dall of the U.S. Geological Survey, for Jean-François de Galaup, comte de Lapérouse (1741–1788), a French navigator who explored this coastal area in 1786.{{cite gnis|id =1423202|name = Mount La Perouse|access-date=2020-01-22}}{{cite web|url=https://www.nps.gov/glba/learn/historyculture/laperouse.htm|title=Mount La Perouse|publisher=National Park Service|access-date=2025-03-21}}

On February 16, 2014, a colossal 68 million ton landslide broke free from the flanks of Mt. La Perouse and flowed nearly {{convert|4.6|mi|km}} from where it originated.{{cite news|url=https://www.adn.com/science/article/68-million-ton-landslide-alaska-mount-la-perouse/2014/03/06/|publisher=Anchorage Daily News|title=68 million ton landslide in Alaska: Mount La Perouse|date=March 5, 2014|url-status=dead|archive-url=https://web.archive.org/web/20200125085326/https://www.adn.com/science/article/68-million-ton-landslide-alaska-mount-la-perouse/2014/03/06/|archive-date=2020-01-25}} The months May through June offer the most favorable weather for climbing and viewing.

The first ascent of the peak was made on August 15, 1952 by a USGS party consisting of James Seitz, Karl Stauffer, Rowland Tabor, Rolland Reid, and Paul Bowen.