For the safest and most scenic, though macabre route, go UP the dry creek bed. Park at N40 54.030 W111 50.633. I guarantee you'll find the local litter amazing and sobering. It's an easy, almost level little hike.
GPS reception is spotty because of terrain, but you can get good readings if you're willing to wait for satellites. However, in case you're in a big hurry to get out of there, which is quite likely, I'm giving more hints than usual. Look south a bit up the hill for a large white boulder, above a small chokecherry tree. Try behind that one.
The cache is an ammo box hidden under a heavy metal tire rim thingy. The big black truck nearby is a relatively new addition and is probably sitting on my old cache. Keep an eye out for more flotsam falling from above and rattlers hiding in the wreckage below. Please replace cache, have fun and take care.