Fade to Silence

If you look at the map after clearing the Prairie Outpost you will see a valley to the West of the Outpost with a road snaking West, then South, then West again. If you follow this road you will pass through a narrow gap to the West on the map, into an area directly North of the Flats Outpost.

The achievement will pop as you pass through this narrow gap.

If you are playing co-op the achievement is Host only.

For anyone who plays this on coop, the person that joins the host will not get the achievement for discovering the Wreck when found.