South Twin Mountain (New Hampshire)
{{Short description|Mountain in the state of New Hampshire, United States}}
{{Use mdy dates|date=January 2025}}
{{Infobox mountain
| name = South Twin Mountain
| photo = South Twin.jpg
| photo_caption = South Twin from Galehead Mountain, taken August 2009
| elevation_m = 1,494
| elevation_ref =
| prominence_m = 464
| prominence_ref =
| listing = White Mountain 4000-Footers
| location = Grafton County, New Hampshire, U.S.
| range = Twin Range
| coordinates = {{coord|44|11.25|N|71|33.32|W |type:mountain_region:US |display=inline,title}}
| topo = USGS South Twin Mountain
| type =
| age =
| first_ascent =
| easiest_route =
}}
South Twin Mountain is a mountain located in Grafton County, New Hampshire, United States. The mountain is part of the Twin Range of the White Mountains. South Twin forms the high point of a north–south ridge, with North Twin Mountain lying approximately one mile to the north and Mount Guyot {{convert|2|mi|km|spell=in}} to the southeast. Galehead Mountain, a lower spur of South Twin, is to the west.
The east face of South Twin drains into the Little River, thence into the Ammonoosuc and Connecticut Rivers, and into Long Island Sound in Connecticut. The northwest slopes of South Twin drain to the North Branch of the Gale River, another tributary of the Ammonoosuc River. Southwest of South Twin Mountain is the valley of Twin Brook, which flows into the Franconia Branch of the East Branch of the Pemigewasset River, through the Pemigewasset Wilderness, thence into the Pemigewasset and Merrimack Rivers, and into the Gulf of Maine in Massachusetts.
The summit of South Twin is open and rocky, but stands of spruce and fir trees grow in close proximity. The Appalachian Trail, a 2,170-mile (3,500-km) National Scenic Trail from Georgia to Maine, crosses the summit of South Twin, passing from Galehead Mountain (and Galehead Hut) to the west towards Mount Guyot to the southeast. The North Twin Trail proceeds north along the ridge crest to the summit of North Twin.
Climate
{{Weather box
|location = South Twin Mountain (NH) 44.1922 N, 71.5514 W, Elevation: {{cvt|4498|ft}} (1991–2020 normals)
|single line = y
|Jan high F = 18.2
|Feb high F = 19.6
|Mar high F = 26.6
|Apr high F = 39.2
|May high F = 52.1
|Jun high F = 60.6
|Jul high F = 65.1
|Aug high F = 63.9
|Sep high F = 57.8
|Oct high F = 45.6
|Nov high F = 32.6
|Dec high F = 23.5
|Jan mean F = 10.3
|Feb mean F = 11.6
|Mar mean F = 18.7
|Apr mean F = 30.9
|May mean F = 43.9
|Jun mean F = 53.0
|Jul mean F = 57.7
|Aug mean F = 56.5
|Sep mean F = 50.2
|Oct mean F = 38.3
|Nov mean F = 26.2
|Dec mean F = 16.6
|Jan low F = 2.4
|Feb low F = 3.5
|Mar low F = 10.9
|Apr low F = 22.5
|May low F = 35.6
|Jun low F = 45.4
|Jul low F = 50.3
|Aug low F = 49.0
|Sep low F = 42.6
|Oct low F = 31.0
|Nov low F = 19.9
|Dec low F = 9.7
|precipitation colour = green
|Jan precipitation inch = 5.93
|Feb precipitation inch = 4.62
|Mar precipitation inch = 6.03
|Apr precipitation inch = 6.58
|May precipitation inch = 7.04
|Jun precipitation inch = 9.55
|Jul precipitation inch = 7.26
|Aug precipitation inch = 7.11
|Sep precipitation inch = 6.41
|Oct precipitation inch = 8.52
|Nov precipitation inch = 7.67
|Dec precipitation inch = 7.10
|source=PRISM Climate Group{{cite web
|url= http://prism.oregonstate.edu/explorer/
|title= PRISM Climate Group, Oregon State University
|publisher= PRISM Climate Group, Oregon State University
|access-date= October 20, 2023
|quote= To find the table data on the PRISM website, start by clicking Coordinates (under Location); copy Latitude and Longitude figures from top of table; click Zoom to location; click Precipitation, Minimum temp, Mean temp, Maximum temp; click 30-year normals, 1991-2020; click 800m; click Retrieve Time Series button.}}
}}
See also
{{portal|New Hampshire}}
References
{{Reflist}}
External links
- {{cite gnis|id=872710|title=South Twin Mountain}}
- {{cite peakbagger |pid=6920 |name=South Twin, New Hampshire}}
- [http://www.outdoors.org/recreation/tripplanner/plan/hiking-south-twin.cfm AMC: Hiking South Twin]
- [http://hikethewhites.com/stwin.html hikethewhites.com: South Twin]
{{Mountains of New Hampshire}}
{{NE 4k ft}}
{{DEFAULTSORT:South Twin}}
Category:Mountains of New Hampshire
Category:New England Four-thousand footers
Category:Mountains on the Appalachian Trail
{{NewHampshire-geo-stub}}