{{short description|Mountain in Washington (state), United States}} {{Use American English|date=February 2026}} {{Use mdy dates|date=January 2025}} {{Infobox mountain | name = Mount Roosevelt | image = Mount Roosevelt from Snow Lake.jpg | image_caption = Mount Roosevelt and Snow Lake | elevation_ft = 5835 | elevation_ref = <ref name="pb">{{cite peakbagger|2098|Mount Roosevelt, Washington}}</ref> | prominence_ft = 275 | prominence_ref = <ref name="pb"/> | isolation_mi = 0.5 | isolation_ref = <ref name="listsofjohn">{{cite web|url=https://listsofjohn.com/peak//50608|title=Roosevelt, Mount - 5,835' WA|website=listsofjohn.com|accessdate=2020-06-20}}</ref> | parent_peak = Kaleetan Peak (6,259 ft)<ref name="listsofjohn"/> | country = United States | state = Washington | region = King | region_type = County | part_type = Protected area | part = Alpine Lakes Wilderness | range = Cascade Range | map = Washington#USA | map_caption = Location of Mount Roosevelt in Washington | coordinates = {{coord|47.469757|N|121.477128|W|type:mountain_region:US-WA_scale:100000_source:ngs|format=dms|display=inline,title}} | range_coordinates = | coordinates_ref = <ref name="pb"/> | topo = USGS ''Snoqualmie Pass'' | first_ascent = | easiest_route = Scrambling Southeast Route<ref name="Beckey, Fred W 2008"/> }}
'''Mount Roosevelt''' is a {{Convert|5835|ft|m|abbr=off|adj=on}} mountain summit located {{convert|6|mi|km|spell=in}} northwest of Snoqualmie Pass, in east King County of Washington state.<ref name="gnis">{{cite gnis|id=1525203|name=Mount Roosevelt|accessdate=2020-06-20}}</ref> It's part of the Cascade Range and is situated within the Alpine Lakes Wilderness, on land managed by Mount Baker-Snoqualmie National Forest. Mount Roosevelt is set above the western shore of Snow Lake, and {{convert|2|mi|km|spell=in}} immediately north of Kaleetan Peak, which is the nearest higher neighbor.<ref name=pb/> Precipitation runoff from the mountain drains into tributaries of the Snoqualmie River. This mountain's toponym was officially adopted in 1989 by the U.S. Board on Geographic Names.<ref name="gnis"/>
==Climate== Mount Roosevelt is located in the marine west coast climate zone of western North America.<ref name="Beckey, Fred W 2008">Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.</ref> Weather fronts originating in the Pacific Ocean travel northeast toward the Cascade Mountains. As fronts approach, they are forced upward by the peaks of the Cascade Range, causing them to drop their moisture in the form of rain or snow onto the Cascades (Orographic lift). As a result, the west side of the Cascades experiences high precipitation, especially during the winter months in the form of snowfall. Because of maritime influence, snow tends to be wet and heavy, resulting in high avalanche danger.<ref name="Beckey, Fred W 2008"/> During winter months, weather is usually cloudy, but due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer.<ref name="Beckey, Fred W 2008"/>
==Geology== The Alpine Lakes Wilderness features some of the most rugged topography in the Cascade Range with craggy peaks and ridges, deep glacial valleys, and granite walls spotted with over 700 mountain lakes.<ref name=smoot>{{cite book|last=Smoot|first=Jeff|title=Backpacking Washington's Alpine Lakes Wilderness|year=2004|publisher=The Globe Pequot Press|location=Helena, Montana}}</ref> Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to the various climate differences. These climate differences lead to vegetation variety defining the ecoregions in this area. The elevation range of this area is between about {{convert|1000|ft|m|-2}} in the lower elevations to over {{convert|9000|ft|m|-2}} on Mount Stuart.
The history of the formation of the Cascade Mountains dates back millions of years ago to the late Eocene Epoch.<ref name=Kruckeberg>{{cite book|last=Kruckeberg|first=Arthur|title=The Natural History of Puget Sound Country|publisher=University of Washington Press|year=1991}}</ref> With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted.<ref name=Kruckeberg/> In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 million years ago.<ref name=Kruckeberg/>
During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris.<ref name=Kruckeberg/> The last glacial retreat in the Alpine Lakes area began about 14,000 years ago and was north of the Canada–US border by 10,000 years ago.<ref name=Kruckeberg/> The U-shaped cross section of the river valleys is a result of that recent glaciation. Uplift and faulting in combination with glaciation have been the dominant processes which have created the tall peaks and deep valleys of the Alpine Lakes Wilderness area.
==Gallery== <div style="max-width: 500px;"> <gallery mode="slideshow"> File:Roosevelt and Kaleetan from Little Bandera.jpg|Mt. Roosevelt (left) and Kaleetan Peak (right) from Bandera Mountain File:Snowy Mount Roosevelt.jpg|Mount Roosevelt in autumn File:Roosevelt from Defiance.jpg|Southwest aspect seen from Mt. Defiance.<br />(Mt. Hinman in the distance) File:Mt. Roosevelt summit.jpg|Mt. Roosevelt summit with Kaleetan behind File:Mount Roosevelt from Caroline Peak.jpg|Northwest aspect of Mt. Roosevelt centered </gallery> </div>
==See also== *{{Portal-inline|Mountains|size=tiny}} *List of peaks of the Alpine Lakes Wilderness * Geography of Washington (state) * Geology of the Pacific Northwest
==References== {{reflist}}
==External links== * Weather forecast: [https://www.yr.no/en/forecast/daily-table/2-5808783/United%20States/Washington/King/Mount%20Roosevelt Mount Roosevelt] *[https://www.fs.usda.gov/r06/mbs/recreation Alpine Lakes Wilderness (Mt. Baker-Snoqualmie National Forest)] U.S. Forest Service * Video from the summit: [https://www.flickr.com/photos/itsnitram/30041799755/in/album-72157674524770966/ Flickr]
{{DEFAULTSORT:Roosevelt, Mount}} Category:Mountains of Washington (state) Category:Mountains of King County, Washington Category:Cascade Range Category:Mount Baker-Snoqualmie National Forest Category:One-thousanders of the United States