This is a really long read that I like to go back to every few years. It details a search for a German family of 4 that disappeared in Death Valley some decades before. Very neat retelling of all the cold case SAR detective work, speculation, and dead ends that go into such a venture. Also vivid descriptions of just how hostile and alien Death Valley is, and the level of preparation necessary to safely mount these excursions (hauling out water jugs to bury in the desert, etc.)

Last time I read it I was bored and found the exact locations on caltopo, just from descriptions on the blog.

Along similar lines, the same guy also hunted down a SR-71 prototype crash site in the same area: https://www.otherhand.org/home-page/area-51-and-other-strange-places/bluefire-main/bluefire/the-hunt-for-928/