Frontage road on North side of interstate can be accessed from either the Northbound or Southbound lanes of I-15. If you are Northbound you will find a tunnel under the interstate to reach the frontage road. From the parking area it is less than a five minute walk to GZ. Not too many muggles out here, with the exception of those traveling nearby at 75+MPH. There is a small cattle trail all the way to the area of the cache...good to get out and stretch the legs. No rough terrain. I promise. Have fun and have a safe trip.