Years ago, backpacked into Tehachipi Valley in the central Sierra Neveda Mountains in Calif. Can't remember the name of the river now, maybe one of the forks of the King. Anyway, this was pretty remote. I was the first one fishing down the river, nailed a couple 12 - 14 'bows. My Dad was coming behind me about 2 holes back. He killed two Rattlers in the trail, that I had apparently walked right by! We saw one more that afternoon next to the river. Being a remote area, and not wanting to deal with the possibility of snake bite...we hiked out the next day.