The
Lost River Range is a group of high mountains located in central
IdahoIdaho is a state in the Pacific Northwest region of the United States of America. The state's largest city and capital is Boise. Residents are called "Idahoans." Idaho was admitted to the Union on 3 July 1890 as the 43rd state....
, in the northwestern
United StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
. It runs southeast for approximately 75 miles (120 km) from the
Salmon River-United States:There are as many as 17 Salmon Rivers in the United States, including:*Salmon River , Hyder, Alaska*Salmon River *Salmon River *Salmon River *Salmon River , tributary of Lake Ontario...
near the community of
ChallisChallis is a city in Custer County, Idaho, United States. The population was 909 at the 2000 census. The city is the county seat of Custer County.-Geography:Challis is located at ....
to the
Snake River ValleyThe Snake River is the largest tributary of the Columbia River, flowing through the U.S. states of Wyoming, Idaho, Oregon, and Washington. The river's watershed consists of , and the average discharge at its mouth is...
near
ArcoArco is a city in Butte County, Idaho, United States. The population was 1,026 at the 2000 census. The city is the county seat of Butte County....
. To the west are the valleys of the Salmon and the
Big Lost RiverThere are two rivers in Idaho named "Lost", the Big Lost River and the Little Lost River. They are often considered separate streams, but both flow into the same depression and become subterranean, feeding the Snake River Plain Aquifer. The rivers are located in Custer County and Butte County, in...
s, while to the east are the
Little Lost RiverThere are two rivers in Idaho named "Lost", the Big Lost River and the Little Lost River. They are often considered separate streams, but both flow into the same depression and become subterranean, feeding the Snake River Plain Aquifer. The rivers are located in Custer County and Butte County, in...
and Pashimeroi Valleys.
none
The range starts at the east bank of the Salmon River, at an elevation of about 5000 feet (1525 m).
The
Lost River Range is a group of high mountains located in central
IdahoIdaho is a state in the Pacific Northwest region of the United States of America. The state's largest city and capital is Boise. Residents are called "Idahoans." Idaho was admitted to the Union on 3 July 1890 as the 43rd state....
, in the northwestern
United StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
. It runs southeast for approximately 75 miles (120 km) from the
Salmon River-United States:There are as many as 17 Salmon Rivers in the United States, including:*Salmon River , Hyder, Alaska*Salmon River *Salmon River *Salmon River *Salmon River , tributary of Lake Ontario...
near the community of
ChallisChallis is a city in Custer County, Idaho, United States. The population was 909 at the 2000 census. The city is the county seat of Custer County.-Geography:Challis is located at ....
to the
Snake River ValleyThe Snake River is the largest tributary of the Columbia River, flowing through the U.S. states of Wyoming, Idaho, Oregon, and Washington. The river's watershed consists of , and the average discharge at its mouth is...
near
ArcoArco is a city in Butte County, Idaho, United States. The population was 1,026 at the 2000 census. The city is the county seat of Butte County....
. To the west are the valleys of the Salmon and the
Big Lost RiverThere are two rivers in Idaho named "Lost", the Big Lost River and the Little Lost River. They are often considered separate streams, but both flow into the same depression and become subterranean, feeding the Snake River Plain Aquifer. The rivers are located in Custer County and Butte County, in...
s, while to the east are the
Little Lost RiverThere are two rivers in Idaho named "Lost", the Big Lost River and the Little Lost River. They are often considered separate streams, but both flow into the same depression and become subterranean, feeding the Snake River Plain Aquifer. The rivers are located in Custer County and Butte County, in...
and Pashimeroi Valleys.
none
The range starts at the east bank of the Salmon River, at an elevation of about 5000 feet (1525 m). It quickly rises to Grouse Creek Mountain (11,085 ft, 3378 m) and Dickey Peak (11,141 ft, 3395 m), and then descends to Double Springs Pass, location of one of just two roads to cross the range. Nearby is an interpretive site explaining the effects of the magnitude 6.9
Borah Peak EarthquakeThe 1983 Borah Peak earthquake occurred on October 28, 1983, in Borah Peak, Idaho. It is currently the most significant earthquake recorded in the state. The earthquake was a magnitude 6.9 on the Richter scale.-Geography:...
that hit the range on October 28, 1983. The Big Lost River Valley fell and the Lost River Range rose, leaving a
fault scarpA fault scarp is the topographic expression of faulting attributed to the displacement of the land surface by movement along the fault. It can be caused by differential erosion along an old inactive geologic fault with hard & weak rock, or by a movement on an active fault. In many cases, bluffs...
of up to 14 feet (5 m) along the base of the mountains.
center
The range then rises into its high central section, which includes many of the state's highest peaks.
Borah PeakBorah Peak is the highest mountain in the U.S. state of Idaho. It is located in the central section of the Lost River Range, within the Challis National Forest in eastern Custer County. The peak is named for William Borah , a prominent U.S...
, the highest, climbs to 12,662 feet (3859 m). Further south are Mount Idaho (12,065 ft, 3677 m), Leatherman Peak (12,228 ft, 3727 m), Mount Church (over 12,200 ft, 3720 m), Mount Breitenbach (12,140 ft, 3700 m), and Lost River Mountain (12,078 ft, 3681 m). To the east of this section of the range lies the remote canyons of the Upper Pashimeroi Valley, including scenic
Merriam LakeMerriam Lake is situated in the Lost River Range in Idaho, surrounded by mountains over high....
.
The range then descends to Pass Creek Summit, the second road to cross its crest. It continues to King Mountain (10,612 ft, 3235 m), a favorite site for hang gliders. Finally it descends sharply to the Snake River Valley near the community of Arco, at an elevation of 5300 feet (1615 m).
center
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