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 following tables list some important mountain passes in the Rocky Mountains of the U.S. state of Colorado. 1  1 Mountain passes and highway summits traversed by improved roads.  2 Mountain summit highways.