The "Catalina" mountains, run from the "Sonoran Desert" life zone at the base, through grass land as you go up, I forget what the next level is called, but it's scrub brush, then there is the Alpine Zone near the top, with the Cloud Forest at the crown (what hasn't been cut to make room for repeaters and antennae)
This mountain range is one of 4 that surround the city of Tucson Az USA. They are the 
Catalina, Rincon, Santa Maria and Tucson mountains.