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.
In addition, the high peaks of the range make it popular for mountain climbing. The highest peak in the Rocky Mountains is Mount Elbert at 14,400 feet (4,401 m) and is located in Colorado.