Long distance contact

Today I went hiking with my wife around chain lakes in Yosemite. It was a tough hike, but once we had a nice dinner at 9,500ft I turned on my radio to see what we could hear. After some scanning I picked up some folks having a QSO in Monterey (150 miles away!). After they were done I called CQ and had a nice conversation with them. Sadly I didn't write down their call signs, or manage to work out how my signal was getting to them, My guess is that I was Loma Pioneer Repeater Club since I was on 442.900 + PL162.2 that matches their repeater network. It was very reassuring to know that even out there we could contact people if we had any kind of emergency.