Lewis and Clark went over them first, so obviously them!
Rocky Mountains
The Rocky Mountains are found in the west of the United States and Canada.
rocky mountains
animals having a cover of fur around their bodies like yak are found in the rocky mountains.
yes
Yes
The Rocky Mountains are found in the western United States.
The Rocky Mountains and the Appalachian Mountains.
Extrusive igneous rock found in the southern half of the Rocky Mountains indicates that this is section of mountains was once VOLCANIC!
A long time ago
the appalachain mountains
The Rocky Mountains