Old Baldy (Montana)
| Old Baldy | |
|---|---|
| Variant name: Twin Peak[1] | |
 Aerial view of southeast aspect, upper right. (Our Lake in lower left) | |
| Highest point | |
| Elevation | 9,156 ft (2,791 m)[2] |
| Prominence | 1,356 ft (413 m)[2] |
| Parent peak | Rocky Mountain (9,392 ft)[3] |
| Isolation | 3.03 mi (4.88 km)[3] |
| Coordinates | 47°51′14″N112°49′23″W/ 47.85386903°N 112.82292091°W[1] |
| Geography | |
  Old Baldy Location in Montana  Old Baldy Location in the United States | |
| Location | Teton County, Montana,U.S. |
| Parent range | Rocky Mountains Rocky Mountain Front Sawtooth Range |
| Topo map | USGSOur Lake |
| Geology | |
| Age of rock | Mississippian |
| Type of rock | dolomite,limestone |
Old Baldyis a 9,156-foot (2,791-metre)double summitmountain located inTeton Countyof theU.S. stateofMontana.[1]
Description[edit]
The west summit is slightly higher than the 9,150-foot east summit, and approximately 1,000 feet distance separates the two.[2]Old Baldy is located along theRocky Mountain Front,which is a subset of theRocky Mountains.It is situated 11 miles east of theContinental Divide,in theBob Marshall Wilderness,on land managed byLewis and Clark National Forest.The nearest town isChoteau,29 miles to the east, and nearest access is the South Fork Teton Road 109. Precipitationrunofffrom the east side of the mountain drains into headwaters of South ForkTeton River,and the west side drains into tributaries of the North ForkSun River.Topographic reliefis significant as the east aspect rises 3,350 feet (1,020 meters) above South Fork Teton River in two miles. The Old Baldy name was officially adopted by theUnited States Board on Geographic Nameson December 31, 1959.[1]
Geology[edit]
Old Baldy is composed ofsedimentary rocklaid down during thePrecambriantoJurassicperiods. Formed in shallow seas, this sedimentary rock was pushed east and over the top of younger rock during theLaramide orogeny.[4]TheLewis Overthrustextends over 280 miles (450 km) fromMount Kiddin Alberta, south to Steamboat Mountain which is located 40 miles south of Old Baldy, which places Old Baldy within the southern extent of the Lewis Overthrust.[5]
Climate[edit]
Based on theKöppen climate classification,Old Baldy is located in asubarctic climatezone characterized by long, usually very cold winters, and mild to warm summers.[6]Winter temperatures can drop below −10 °F with wind chill factors below −30 °F.
Rocky Mountain (Montana)is a nearby peak to the south of Old Baldy. There is no weather station, but this climate table containsinterpolateddata.
| Climate data for Rocky Mountain (MT) 47.8077 N, 112.8018 W, Elevation: 8,533 ft (2,601 m) (1991–2020 normals) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °F (°C) | 23.8 (−4.6) |
24.3 (−4.3) |
30.1 (−1.1) |
35.4 (1.9) |
44.4 (6.9) |
52.5 (11.4) |
63.4 (17.4) |
63.1 (17.3) |
53.5 (11.9) |
39.3 (4.1) |
28.3 (−2.1) |
22.5 (−5.3) |
40.1 (4.5) |
| Daily mean °F (°C) | 17.2 (−8.2) |
16.5 (−8.6) |
21.1 (−6.1) |
26.2 (−3.2) |
34.7 (1.5) |
42.2 (5.7) |
51.9 (11.1) |
51.7 (10.9) |
43.2 (6.2) |
31.3 (−0.4) |
21.9 (−5.6) |
16.2 (−8.8) |
31.2 (−0.5) |
| Mean daily minimum °F (°C) | 10.6 (−11.9) |
8.7 (−12.9) |
12.2 (−11.0) |
16.9 (−8.4) |
25.0 (−3.9) |
32.0 (0.0) |
40.4 (4.7) |
40.2 (4.6) |
32.8 (0.4) |
23.3 (−4.8) |
15.4 (−9.2) |
9.9 (−12.3) |
22.3 (−5.4) |
| Averageprecipitationinches (mm) | 5.39 (137) |
4.90 (124) |
4.84 (123) |
4.47 (114) |
4.39 (112) |
4.81 (122) |
1.82 (46) |
1.78 (45) |
2.53 (64) |
3.82 (97) |
4.97 (126) |
5.54 (141) |
49.26 (1,251) |
| Source: PRISM Climate Group[7] | |||||||||||||
See also[edit]
References[edit]
- ^abcd"Old Baldy".Geographic Names Information System.United States Geological Survey,United States Department of the Interior.Retrieved2021-11-07.
- ^abc"Old Baldy, Montana".Peakbagger.com.Retrieved2021-11-07.
- ^ab"Old Baldy - 9,156' MT".listsofjohn.com.Retrieved2021-11-07.
- ^Gadd, Ben (2008). "Geology of the Rocky Mountains and Columbias".
{{cite journal}}:Cite journal requires|journal=(help) - ^Feinstein, Shimon; Kohn, Barry; Osadetz, Kirk; Price, Raymond A. (2007-01-01). "Thermochronometric reconstruction of the prethrust paleogeothermal gradient and initial thickness of the Lewis thrust sheet, southeastern Canadian Cordillera foreland belt".Geological Society of America Special Papers.433:167–182.doi:10.1130/2007.2433(08).ISBN978-0-8137-2433-1.ISSN0072-1077.
- ^Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007)."Updated world map of the Köppen−Geiger climate classification".Hydrol. Earth Syst. Sci.11(5): 1633–1644.Bibcode:2007HESS...11.1633P.doi:10.5194/hess-11-1633-2007.ISSN1027-5606.S2CID9654551.
- ^"PRISM Climate Group, Oregon State University".PRISM Climate Group, Oregon State University.RetrievedOctober 4,2023.
To find the table data on the PRISM website, start by clickingCoordinates(underLocation); copyLatitudeandLongitude figuresfrom top of table; clickZoom to location;clickPrecipitation, Minimum temp, Mean temp, Maximum temp;click30-year normals, 1991-2020;click800m;clickRetrieve Time Seriesbutton.
External links[edit]
- Weather:Old Baldy