I’m not sure which “highway 15” you mean, so I can’t name the city confidently from that wording alone.

Most likely matches

  • Interstate 15 in Utah : the city just above the pass could be Cedar City , depending on which pass you mean.
  • Interstate 15 in California/Nevada : the answer could be a different city entirely, since I-15 runs through several states and multiple passes.

What I need

Please send one of these:

  • the state ,
  • the pass name , or
  • a nearby landmark/city.

Then I can give you the exact city.