Ring vs. Rang vs. Rung. You can tell when to use ring, rang, or rung by whether you need the present, past, or past participle (used with has or have) form. I always ring the bell after I knock. He rings twice before entering.
The rocky mountains passes through six states. The six US states  are: New Mexico, Utah, Colorado, Idaho, Montana, and Wyoming.
The mountain range located in Italy, France, and Switzerland. Rocky Mountains This mountain range is located in the Western region of Canada and extends into the U.S. Sierra Madre Mountains These mountain ranges run down the eastern and western coasts of Mexico.