Mount Conness

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Mountain in California, US

title: "Mount Conness" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["mountains-of-yosemite-national-park", "mountains-of-mono-county,-california", "mountains-of-tuolumne-county,-california", "mountains-of-northern-california", "three-thousanders-of-the-united-states"] description: "Mountain in California, US" topic_path: "geography/united-states" source: "https://en.wikipedia.org/wiki/Mount_Conness" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Mountain in California, US ::

::data[format=table title="Infobox mountain"]

FieldValue
nameMount Conness
photoFile:Mount Conness, north aspect.jpg
photo_captionfrom the south, showing Conness Glacier
photo_size304px
elevation_ft12590
elevation_ref
prominence2630 ft
prominence_ref
parent_peakMount Dana
* Sierra Peaks Section<ref name"sps"
locationMono / Tuolumne counties, California, U.S.
mapCalifornia
map_captionLocation in California
map_size240
label_positionbelow
rangeSierra Nevada
coordinates
coordinates_ref
topoUSGS Tioga Pass
first_ascent1864 by Clarence King and James T. Gardiner
lastWhitney
firstJosiah D.
author-linkJosiah Whitney
urlhttp://www.yosemite.ca.us/library/the_yosemite_book/chapter_4.html#page_92
titleYosemite Guide Book
page92
year1870
accessdate2009-01-04}}
easiest_routeScramble,
::

| name = Mount Conness | photo = File:Mount Conness, north aspect.jpg | photo_caption = from the south, showing Conness Glacier | photo_size = 304px | elevation_ft = 12590 | elevation_ref = | prominence = 2630 ft | prominence_ref = | parent_peak = Mount Dana | listing =

  • Sierra Peaks Section
  • California highest major peaks 19th | location = Mono / Tuolumne counties, California, U.S. | map = California | map_caption = Location in California | map_size = 240 | label_position = below | range = Sierra Nevada | coordinates = | range_coordinates = | coordinates_ref = | topo = USGS Tioga Pass | first_ascent = 1864 by Clarence King and James T. Gardiner | last = Whitney | first = Josiah D. | author-link = Josiah Whitney | url = http://www.yosemite.ca.us/library/the_yosemite_book/chapter_4.html#page_92 | title = Yosemite Guide Book | page = 92 | year = 1870 | accessdate = 2009-01-04}} | easiest_route = Scramble,

Mount Conness is a 12590 foot mountain in the Sierra Nevada range, to the west of the Hall Natural Area. Conness is on the boundary between the Inyo National Forest and Yosemite National Park. The Conness Glacier lies north of the summit.

History

Mount Conness is named for John Conness (1821–1909), a native of Ireland who came to United States in 1836. Conness was a member of California legislature (1853–1854, 1860–1861) and the United States Senator from California (1863–1869). He resided in Massachusetts from 1869 until his death in 1909. | url = http://bioguide.congress.gov/scripts/biodisplay.pl?index=c000695 | title = Conness, John | publisher = Biographical Directory of the United States Congress | accessdate = 2009-08-09 }}

In 1860 Josiah Dwight Whitney Jr. was appointed State Geologist of California and he organized the California Geological Survey (1863–1870). Whitney, along with William H. Brewer, Clarence King, James T. Gardiner, Charles F. Hoffmann, Lorenzo G. Yates, Richard D. Cotter and others, made an extensive survey of California, including the Sierra Nevada and Yosemite region. Whitney wrote:

::quote

"Mount Conness bears the name of a distinguished citizen of California, now a United States Senator, who deserves more than any other person, the credit of carrying the bill, organizing the Geological Survey of California, through the Legislature, and who is chiefly to be credited for another great scientific work, the Survey of the 40th Parallel." {{cite book | last = Whitney | first = Josiah D. | author-link = Josiah Whitney | url = http://www.yosemite.ca.us/library/the_yosemite_book/chapter_4.html#page_90 | title = Yosemite Guide Book | year = 1870 | page = 90 | accessdate = 2009-01-04 }} ::

Clarence King, a geologist for the Survey and the first to ascend Mount Conness along with James T. Gardiner in 1864, wrote:

::quote

"I recognized the old familiar summit... and that firm peak with titan strength and brow so square and solid, it seems altogether natural we should have named it for California’s statesman, John Conness." {{cite book | last = King | first = Clarence | url = http://www.yosemite.ca.us/library/mountaineering_in_the_sierra_nevada/13.html#page_328 | page = 328 | title = Mountaineering in the Sierra Nevada | year = 1872 | accessdate = 2009-01-04}} ::

Climate

|location = Mount Conness 37.9667 N, 119.3129 W, Elevation: 11903 ft (1991–2020 normals) |single line = y

|Jan high F = 29.5 |Feb high F = 28.8 |Mar high F = 31.6 |Apr high F = 35.4 |May high F = 42.7 |Jun high F = 52.2 |Jul high F = 59.9 |Aug high F = 59.2 |Sep high F = 53.9 |Oct high F = 45.1 |Nov high F = 35.8 |Dec high F = 29.6

|Jan mean F = 19.9 |Feb mean F = 18.4 |Mar mean F = 20.7 |Apr mean F = 23.9 |May mean F = 30.9 |Jun mean F = 40.4 |Jul mean F = 47.8 |Aug mean F = 47.1 |Sep mean F = 41.7 |Oct mean F = 33.5 |Nov mean F = 25.4 |Dec mean F = 19.6

|Jan low F = 10.4 |Feb low F = 8.0 |Mar low F = 9.8 |Apr low F = 12.3 |May low F = 19.1 |Jun low F = 28.6 |Jul low F = 35.8 |Aug low F = 35.0 |Sep low F = 29.5 |Oct low F = 22.0 |Nov low F = 15.0 |Dec low F = 9.7

|precipitation colour = green |Jan precipitation inch = 8.92 |Feb precipitation inch = 7.78 |Mar precipitation inch = 7.32 |Apr precipitation inch = 3.69 |May precipitation inch = 2.21 |Jun precipitation inch = 0.75 |Jul precipitation inch = 0.66 |Aug precipitation inch = 0.50 |Sep precipitation inch = 0.65 |Oct precipitation inch = 2.32 |Nov precipitation inch = 3.64 |Dec precipitation inch = 7.51

|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 9, 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.}}

Climbing

Conness is a training ground for alpine climbing since it utilizes many aspects of mountaineering: trails, scrambling, and glacier trekking; all at a high altitude for California. Usually climbers camp near Tioga Pass and begin the climb at dawn. It takes about a full day to summit.

The summit block consists of scrambling along a knife edge ridge leading to the summit consisting of views to the east of the Conness Glacier and to the west toward Tuolumne Meadows. ::figure[src="https://upload.wikimedia.org/wikipedia/commons/2/2c/Mt_Casson_Pano_4wiki.jpg" caption="Mount Conness seen from Saddlebag Lake Road."] ::

References

References

  1. {{cite ngs
  2. {{cite peakbagger
  3. {{cite loj
  4. {{cite sps
  5. Browning, Peter. (2005). "Yosemite Place Names: The Historic Background of Geographic Names in Yosemite National Park". Great West Books.
  6. {{cite Farquhar

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

mountains-of-yosemite-national-parkmountains-of-mono-county,-californiamountains-of-tuolumne-county,-californiamountains-of-northern-californiathree-thousanders-of-the-united-states