Rising from the vast Snake River Plain with an extensive set of foothills, the Pioneer Mountains are Idaho's second highest mountain range and in some ways it's most enticing. The highest point of the range is Idaho's 9th highest peak, Hyndman Peak at 12,009 ft. It also has at least 15 other peaks that rise above 11,500 ft. besides Hyndman.
Only the Lost River Range is higher than the Pioneers. Although the Lemhi Mountains even farther East contain 12,197 ft. Diamond Peak the rest of the range is significantly lower (although still high) than the Pioneers having only 2 other peaks besides Diamond that rise above 11,500 ft.
In addition to altitude the Pioneers also boast great rock for climbing and a vast amount of impressive faces and jagged peaks. The range has almost limitless opportunities for scrambling, hiking, and technical climbing. There is something here for everyone.
The Pioneers stretch nearly 50 miles in length between Ketchum and Arco, trending generally East-West and reaching nearly 25 miles in width. This is somewhat unusual as most Idaho mountain ranges (and Western U.S. ranges ) tend to go North-South. There are only a few other ranges I'm aware of with this directional tendency. The Uintas of Utah are the largest such range, but others include the Raft River Mountains, Traverse Range and Black Mountains also of Utah. Colorado has a number of East-West Ranges as well, including the Elkhead Mountains, Williams Fork Mountains, and Danford Hills. The San Juan Mountains can also be thought of as having this directional tendency but they are more of a large mass of mountains than a narrow ridge leading in one direction. (Info courtesy of SP user Scott.)
The Southern slopes of the Pioneers are hidden by a vast system of dry, mostly treeless foothills, while the Northern side is blurred into the beautiful Copper Basin, the Boulder Mountains, and the Lost River Valley.
On the West, the Wood River Valley forms it's boundary and seperates it from the Smoky Mountains. On the East the boundary is formed by the Lost River Valley and the White Knob Mountains.
Glaciers have left their mark on the Pioneer Mountains, as with most Idaho mountains, carving out many large U-shaped valleys including Wildhorse Canyon, Fall Creek, and Kane Creek to name a few. There are also abundant cirques and glacial lakes. Among the high lakes of the Pioneers is Idaho's highest lake, 10,438 ft. high Goat Lake. There are many other stunning lakes over 10,000 ft., all among Idaho's highest.
Because of the range's proximity to Sun Valley there are some areas of the range that see a lot of traffic year-round. Because Sun Valley is, of course, primarily a ski resort there is actually quite a lot of winter activity in the Pioneers, especially in the areas closest to the resort. Wildhorse Canyon is a popular destination in the summer as there is a nice campground located there and the scenery is astounding. The more remote sections of the range are near Copper Basin in the Eastern section of the Range, where there are many high, but seldom visited mountains.
The Pioneers are a dry range, sitting in the rain shadow of the mountains to the East and North. The arid Snake River Plain forms its Southern boundary. What timber there is is found mostly on North facing slopes in the lower to mid-elevations. Another reason for the lack of substantial timber is that in addition to being dry, the terrain in the higher portions of the range is either too high or too rocky for trees to take hold. This does not stop extraordinary trees from growing in the range though. The oldest known living Limber Pine was discovered in the range in 1953 by dendrochronologist Edmund Schulman at 1,650 years old (Lopez, 244). Temperatures can range from extremely hot in the summer to extremely cold in the winter. The hottest portions of the range are the southern foothills near the desolate Crater of the Moon National Monument where temperatures can easily reach above 100 degrees. As can be expected, the higher you go the cooler you'll be. Temperatures can be very comfortable higher up in the mountains during the summer although the wind is nearly constant.
The winter can be bitterly cold with temperatures dipping below zero. Even though Sun Valley sits at the foot of the Pioneers the range doesn't see as much snow each winter as do some of the other nearby ranges such as the Sawtooths to the Northwest. Because of elevation what snow the Pioneers do receive can linger on into August in the shadows of the higher peaks. Here is a link the the Forcast for Sun Valley at the Western edge of the range. For the Eastern part of the change check out this link to the forecast for Arco. This is a table of the average temperatures, and precipitation amounts for Sun Valley as well as records.
|Month||Avg. High (F)||Rec. High (F)||Avg. Low (F)||Rec. Low (F)||Avg. Precip (in.)|
The range is managed by the Sawtooth National Forest on the South side of its crest and by the Challis National Forest on its North side. The county line of Blaine and Custer Counties also follows the Pioneer Crest. A portion of the Pioneers has been proposed for wilderness designation but no action has been taken as of yet.
Here is a list of some of the major peaks in the Pioneers. There are of course many more named and unnamed 10,000+ ft. peaks in this range but if I were to put every peak on this table it would turn into a gigantic project. Luckily there's already a book out there with EVERYTHING in it. If you want more information, I refer you to the link at the bottom of the page for Tom Lopez's book.
|Peak||Elevation (ft.)||Class||USGS Quad|
|Hyndman Peak||12,009||2||Hyndman Peak|
|Goat Mountain||11,913||3||Phi Kappa Mountain|
|The Fin||11,887||3-4||Standhope Peak|
|Standhope Peak||11,878||3||Standhope Peak|
|Devil's Bedstead East||11,865||3||Phi Kappa Mountain|
|Brocky Peak||11,839||3||Standhope Peak|
|Altair Peak||11,825||3||Standhope Peak|
|Old Hyndman||11,775||3||Grays Peak|
|Duncan's Peak||11,755||3-4||Phi Kappa Mountain|
|Pegasus Peak||11,736||3||Standhope Peak|
|Angel's Perch||11,687||2||Standhope Peak|
|Cobb Peak||11,650||3||Hyndman Peak|
|Pyramid Peak||11,628||2||Copper Basin|
|Salzburger Spitzl||11,600+||2||Phi Kappa Mountain|
|Big Basin Peak||11,510||3||Grays Peak|
|Smiley Mountain||11,508||2||Smiley Mountain|
|Big Black Dome||11,353||2||Big Black Dome|
|McIntyre Peak||11,210||3||Hyndman Peak|
|Devil's Bedstead West||11,051||3||Phi Kappa Mountain|
|Atlas Peak||11,039||3||Smiley Mountain|
|Jacqueline Peak||11,027||3||Grays Peak|
|Handwerk Peak||10,840||2 (West Summit) 3-4 (East Summit)||Phi Kappa Mountain|
|Copper Basin Knob||10,784||3||Copper Basin|
|Grays Peak||10,563||2||Grays Peak|
|Scorpion Mountain||10,545||3||Muldoon Canyon|
|Phi Kappa Mountain||10,516||2||Phi Kappa Mountain|
|Glide Mountain||10,265||2||Starhope Mine|
|Johnstone Peak||9,949||2||Hyndman Peak|