There is a resort in Furnace Creek,CA, that's within the Death Valley National Park, Â with a golf course, lowest golf course in the world, -214 ft. elevation .
http://furnacecreekresort.com/I've stayed there a few times in the cooler fall time frame .
The project probably has an association with Project Aurora, rumored to be the next 'Black Project' to come out of the Lockheed Skunkworks .
There's been a few sightings of a 'rope with knots' type of 'contrail' (condensation trail, from jet exhaust) here in the southwestern US in the last 10 years or so, most reports, is that it is a hypersonic aircraft with an unconventional jet power-plant loosely based on a pulse jet engine .