Mount Desor

{{short description|Mountain in United States of America}}

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

{{Infobox mountain

| name = Mount Desor

| photo =

| photo_caption = Isle Royale in the fog on Lake Superior

| elevation_ft = 1394

| elevation_ref = {{cite peakbagger |id=6451 |name=Mount Desor, Michigan |accessdate=2008-02-09}}

| prominence_ft = 792

| prominence_ref =

| location = Isle Royale National Park, Keweenaw County, Michigan, U.S.

| range = Superior Upland

| map = USA Michigan

| map_width = 220

| map_caption = Location of Mount Desor on Isle Royale

| coordinates = {{coord|47.9554438|N|89.0128605|W|type:mountain_region:US-MI_scale:100000_source:GNIS|format=dms|display=inline,title}}

| range_coordinates =

| coordinates_ref = {{cite gnis |id=624580 |name=Mount Desor |accessdate=2013-01-18}}

| topo = USGS Sugar Mountain

| type =

| age =

| first_ascent =

| easiest_route = Trail hike

}}

Mount Desor is the tallest mountain within Isle Royale National Park. Located on Isle Royale in Lake Superior and with an elevation of {{convert|1394|ft|m|-1}}, it is the third highest peak on the lake.

The {{convert|45|mi|km|adj=mid|-long}} Greenstone Ridge Trail crosses the summit of Mount Desor as it traverses the length of the island.{{cite summitpost |id=191040 |title=Greenstone Ridge (Isle Royale) |accessdate=2013-01-17}} The summit is a {{convert|8.5|mi|adj=on}} hike from nearest ferry landing.

On an autumn day after most of the foliage has fallen, it is possible to see Lake Superior's Siskiwit Bay to the south. In other seasons, the view of the surrounding terrain from the densely wooded spot is limited.