Article · Wikipedia archive · Last revised Jun 25, 2026

Mount Isolation

Mount Isolation is a mountain located in Coos County, New Hampshire. The mountain is part of the Presidential Range of the White Mountains. Mount Isolation is the highest peak on the Montalban Ridge which extends south from Boott Spur.

Last revised
Jun 25, 2026
Read time
≈ 2 min
Length
518 w
Citations
5
Source
Mount Isolation
Map
Highest point
Elevation4,003 ft (1,220 m) NGVD 291
Prominence203 ft (62 m)1
ListingWhite Mountain 4000-Footers
Coordinates44°12′53″N 71°18′33″W / 44.2147886°N 71.3092414°W / 44.2147886; -71.30924142
Geography
LocationCoös County, New Hampshire, U.S.
Parent rangePresidential Range
Topo mapUSGS Stairs Mountain

Mount Isolation is a mountain located in Coos County, New Hampshire. The mountain is part of the Presidential Range of the White Mountains. Mount Isolation is the highest peak on the Montalban Ridge which extends south from Boott Spur.

Isolation is in the Presidential Range–Dry River Wilderness, and as its name implies, is one of the most remote White Mountain peaks. Isolation just qualifies as one of the Appalachian Mountain Club's "Four-thousand footers", having the requisite 4,000 feet (1,219 m) of elevation and 200 feet (61 m) of prominence.

Climate

Climate data for Mount Isolation 44.2201 N, 71.3068 W, Elevation: 3,727 ft (1,136 m) (1991–2020 normals)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °F (°C) 19.6
(−6.9)
22.6
(−5.2)
29.1
(−1.6)
41.2
(5.1)
54.3
(12.4)
62.4
(16.9)
67.2
(19.6)
65.7
(18.7)
60.2
(15.7)
47.7
(8.7)
35.1
(1.7)
25.2
(−3.8)
44.2
(6.8)
Daily mean °F (°C) 11.9
(−11.2)
14.0
(−10.0)
20.3
(−6.5)
32.3
(0.2)
45.2
(7.3)
53.9
(12.2)
58.9
(14.9)
57.6
(14.2)
51.7
(10.9)
39.8
(4.3)
28.5
(−1.9)
18.5
(−7.5)
36.1
(2.2)
Mean daily minimum °F (°C) 4.2
(−15.4)
5.3
(−14.8)
11.5
(−11.4)
23.5
(−4.7)
36.0
(2.2)
45.5
(7.5)
50.6
(10.3)
49.6
(9.8)
43.1
(6.2)
32.0
(0.0)
21.9
(−5.6)
11.7
(−11.3)
27.9
(−2.3)
Average precipitation inches (mm) 5.11
(130)
4.58
(116)
5.52
(140)
6.43
(163)
6.12
(155)
7.01
(178)
6.99
(178)
5.97
(152)
5.90
(150)
8.73
(222)
6.81
(173)
6.45
(164)
75.62
(1,921)
Source: PRISM Climate Group3
Climate data for North Isolation 44.2365 N, 71.3032 W, Elevation: 4,121 ft (1,256 m) (1991–2020 normals)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °F (°C) 19.0
(−7.2)
20.9
(−6.2)
27.4
(−2.6)
39.0
(3.9)
52.2
(11.2)
60.2
(15.7)
65.0
(18.3)
63.5
(17.5)
58.0
(14.4)
45.9
(7.7)
33.8
(1.0)
24.5
(−4.2)
42.4
(5.8)
Daily mean °F (°C) 11.1
(−11.6)
12.6
(−10.8)
19.0
(−7.2)
30.7
(−0.7)
43.7
(6.5)
52.6
(11.4)
57.5
(14.2)
56.1
(13.4)
50.2
(10.1)
38.5
(3.6)
27.3
(−2.6)
17.5
(−8.1)
34.7
(1.5)
Mean daily minimum °F (°C) 3.3
(−15.9)
4.2
(−15.4)
10.5
(−11.9)
22.5
(−5.3)
35.3
(1.8)
44.9
(7.2)
50.0
(10.0)
48.8
(9.3)
42.3
(5.7)
31.1
(−0.5)
20.7
(−6.3)
10.5
(−11.9)
27.0
(−2.8)
Average precipitation inches (mm) 5.38
(137)
4.91
(125)
6.02
(153)
6.88
(175)
6.59
(167)
7.65
(194)
7.84
(199)
6.52
(166)
6.51
(165)
9.36
(238)
7.41
(188)
6.91
(176)
81.98
(2,083)
Source: PRISM Climate Group4
See also

See also

References

References

  1. "Mount Isolation, New Hampshire". Peakbagger.com. Retrieved January 31, 2013.
  2. "Mount Isolation". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved January 31, 2013.
  3. "PRISM Climate Group, Oregon State University". PRISM Climate Group, Oregon State University. Retrieved October 26, 2023. 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.
  4. "PRISM Climate Group, Oregon State University". PRISM Climate Group, Oregon State University. Retrieved October 26, 2023. 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 Interpolate grid cell values; click Retrieve Time Series button.
External links