This is done from memory of a trip I took out there almost 25 years ago. I think it was 103.7, which was at that time an oldies station. I was on a business trip to Santa Cruz, where 103.7 came in very well. But I also went to visit a friend in Santa Cruz. I drove on highway 17 which went over the mountain, and remember at the very top, it abruptly changed from 103.7 from SF to another 103.7, which I think was Fresno. It was very repeatable, because I made the drive twice. Both times, both directions, within a narrow pass at the top, maybe one or two swaps, then either one or the other. I know that drive is in a different direction than you are asking about, but it was very interesting to somebody from a flat area.