Twin Sisters Peaks
{{short description|Mountain in Colorado, United States}}
{{Use mdy dates|date=January 2025}}
{{Infobox mountain
| name = Twin Sisters East Peak
| photo = Twin Sisters Peaks, Many Parks Curve Overlook, July 2016.jpg
| photo_caption = Twin Sisters Peaks viewed from Trail Ridge Road
| elevation_ft = 11433
| elevation_ref = The elevation of Twin Sisters East Peak includes an adjustment of +1.388 m (+4.55 ft) from NGVD 29 to NAVD 88.{{cite peakbagger|pid=5638|title=Twin Sisters Peaks, Colorado|access-date=November 6, 2014}}
| prominence_ft = 2298
| isolation_mi = 4.36
| listing = Colorado prominent summits
| range = Front Range
| location = Rocky Mountain National Park, Larimer County, Colorado, U.S.
| map = Colorado
| map_caption = Colorado
| coordinates = {{coord|40.2888732|N|105.5183324|W|type:mountain_region:US-CO_scale:100000|format=dms|display=inline,title}}
| range_coordinates =
| coordinates_ref = {{cite gnis|id=177952|name=Twin Sisters Peaks|access-date=November 6, 2014}}
| topo = USGS 7.5' topographic map
Longs Peak, Colorado
| type =
| age =
| first_ascent =
| easiest_route = hike, scramble
}}
{{Infobox mountain
| name = Twin Sisters West Peak
| photo =
| photo_caption =
| elevation_ft = 11418
| elevation_ref = The elevation of Twin Sisters West Peak includes an adjustment of +1.389 m (+4.56 ft) from NGVD 29 to NAVD 88.{{cite peakbagger|pid=29073|title=Twin Sisters Peaks-West Peak, Colorado|access-date=November 6, 2014}}
| prominence_ft =
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| isolation_mi =
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| listing =
| range =
| location =
| map =
| map_caption =
| coordinates = {{coord|40.289087|-105.519385|format=dms}}
| topo =
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}}
The Twin Sisters Peaks are mountains in Colorado, located in the Front Range in Larimer County, Colorado, straddling Rocky Mountain National Park and Roosevelt National Forest.
History
The mountain was originally known amongst Estes Park locals as Lily Mountain until the name Twin Sisters Peaks was submitted to the Washington Geographic Board on March 7, 1907 by Ellsworth Bethel. The first trail to the summit was constructed in 1914, at the same time the first fire lookout was established at the top by the Forest Service. In 1917, the mountain was officially made part of Rocky Mountain National Park's eastern boundary. Swiss mountaineer Walter Kiener was the first RMNP ranger to operate the fire lookout, serving in this position for five summers. Kiener's presence on the mountain increased visitor traffic and helped to popularize the hike with tourists. In 1936, the trail was reconstructed by the Civilian Conservation Corps. The ranger station was later razed in 1977, although its remains are still visible on the summit.{{cite news|title=Walter Kiener Will Close Ranger Station on Twin Sisters Monday|work=The Estes Park Trail|access-date=13 April 2025|date=6 September 1929|url=https://www.coloradohistoricnewspapers.org/?a=d&d=ETG19290906-01.2.25&e=-------en-20--1--img-txIN%7ctxCO%7ctxTA--------0------}}{{cite news|title=The Traditions of Twin Sisters Peaks|work=The Estes Park Trail|access-date=13 April 2025|date=27 May 1994|url=https://www.coloradohistoricnewspapers.org/?a=d&d=ETG19940527-01.2.175}}
During the Colorado front range floods of 2013, the western side of the mountain experienced a large mudslide, which left a large muddy scar and wiped out several switchbacks of the trail. The trail was later re-defined within the scar to allow hiking to resume, but the damage is still visible from afar.
Historical names
See also
{{Portal|Geology|Geography|North America|United States|Colorado|Mountains}}
- List of Colorado mountain ranges
- List of Colorado mountain summits
- List of Colorado fourteeners
- List of Colorado 4000 meter prominent summits
- List of the most prominent summits of Colorado
- List of Colorado county high points
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References
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External links
{{Sister project links}}
{{Mountains of Colorado}}
{{Rocky Mountain National Park}}
{{Colorado}}
{{Protected areas of Colorado}}
{{Authority control}}
Category:Mountains of Rocky Mountain National Park
Category:Mountains of Larimer County, Colorado
Category:Three-thousanders of the United States
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