Mountains, Montana & Idaho

Mountain Ranges: ID & MT

Hold the cursor over a number to see the name.
Refer to the alphabetical list below to find a desired mountain range.

The Rocky Mountains that the Corps of Discovery crossed were 250 miles wide. To learn what they had expected to find, see the following detail from a map they may have carried with them, compiled by Nicholas King.

  • Absaroka—MT—1
  • Adel—MT—9
  • Albion—ID—42
  • Anaconda—MT—2
  • Aspen—ID—43
  • Bannock—ID—44
  • Bear River—ID—45
  • Bears Paw—MT—83
  • Beartooth—MT—3
  • Beaverhead—MT—4
  • Belt, Big—MT—5
  • Belt, Little—MT—6
  • Big Hole—ID—46
  • Bighorn—MT—82
  • Bighorn Crags—ID—47
  • Big Sheep—MT—84
  • Birdtail—MT—90
  • Bitterroot—MT—8
  • Black Pine—ID—48
  • Boise—ID—49
  • Boulder—ID—50
  • Boulder—MT—85
  • Bridger—MT—9
  • Bull—MT—79
  • Cabinet—MT—10
  • Caribou—ID—51
  • Cassia—ID—52
  • Castle—MT—11
  • Centennial—MT—12
  • Coeur d'Alene—ID/MT—54
  • Clearwater—ID—53
  • Craters of the Moon—ID—55
  • Crazy—MT—14
  • Deep Creek—ID—56
  • Elkhorn—MT—15
  • Flathead—MT—16
  • Flint Creek—MT—17
  • Gallatin—MT—18
  • Garnet—MT—19
  • Glacier Nat'l Park—MT—20
  • Gravelly—MT—21
  • Grays Lake—ID—57
  • Henry's Lake—ID—58
  • Highland—MT—22
  • Highwood—MT—23
  • Judith—MT—81
  • Lemhi—ID—59
  • Lionhead—MT—24
  • Little Rockies—MT—78
  • Lost River—ID—60
  • Madison—MT—25
  • Mission—MT—26
  • Ninemile Divide—MT—87
  • Owyhee—ID—61
  • Palouse Range—ID—89
  • Payette Crest—ID—62
  • Pioneer—ID—63
  • Pioneer, East—MT—28
  • Pioneer, West—MT—27
  • Portneuf—ID—64
  • Pruess—ID—65
  • Pryor—MT—29
  • Purcell—MT—30
  • Rattlesnake—MT—31
  • Reservation Divide—MT—88
  • Rocky Mountain Front—MT—32.
  • Rosebud—MT—77
  • Ruby—MT—33
  • St. Joe—ID—73
  • Salish—MT—34
  • Salmon River—ID—66
  • Sapphire—MT—35
  • Sawtooth—ID—67
  • Selkirk—ID—68
  • Seven Devils—ID—69
  • Smoky—ID—70
  • Snake—ID—71
  • Snowcrest—MT—36
  • Snowy—MT—7
  • Soldier—ID—72
  • Spanish Peaks—MT—37
  • Sublette—ID—74
  • Swan—MT—38
  • Sweet Grass Hills—MT—86
  • Tendoy—MT—40
  • Tobacco Root—MT—39
  • West—ID—75
  • White Cloud—ID—76
  • Whitefish—MT—41
  • Wolf—MT—80