The crossword solution for the term 'ROCKY MTN. STATE' is IDA, which stands for Idaho. Idaho is a state located in the northwestern region of the United States. It is bordered by Montana to the east and northeast, Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west. Idaho is known for its Rocky Mountains, which are part of the larger Rocky Mountain range that spans from Canada to Mexico. The state is also home to many rivers, lakes, and forests.