Gem State, ID, Idaho - a state in the Rocky Mountains

Beaver State, OR, Oregon - a state in northwestern United States on the Pacific

Evergreen State, WA, Washington - a state in northwestern United States on the Pacific

Equality State, WY, Wyoming - a state in the western United States; mountainous in the west and north with the Great Plains in the east

river - a large natural stream of water (larger than a creek); "the river was navigable for 50 miles"

Twin Falls, Twin - a waterfall in the Snake River in southern Idaho