Here's the 'Mysterious San Luis Valley' part. I was camped in the BLM campground up above on the south rim of the canyon. Nobody else was in the campground. The camp host was down below me on a spot in the canyon. Sometime after 10pm I guess a group of girl scouts came in and camped about a 100yds south of me. They were giggling and carrying on like girls on a campout do and woke me up, but didn't bother me. I had taken the tarp off my rock shelter and thought I'd just lay there and watch the stars for a while. At 11:25pm the loudest explosion I've heard in a while went off to the north of me and echoed in the canyon. The gigglers even got real quiet. There was no flash and not a cloud in the sky. I climbed up on the tallest rock to look down as I thought maybe the camp host's RV had blown up. Nothin happenin there, no sight of anything on the horizon all around. No emergency vehicles started flooding the area. Next morning, I checked all around as best I could, but all was copasetic and still in place. There's no construction work, no active mining, no avalanche or rock slide control goin on right around there. I have no clue what it was, but for now I have an unexplained San Luis Valley experience.
