This trailer park is situated somewhere in Texas, serving as a settlement for people.
At some point after the apocalypse, Althea found this location and came to use it as a base of operations. It is also the location where she took Morgan and John after she rescued them from Leland's Group. It is also the location where Leland's group were defeated by the combined efforts of Morgan Jones, John Dorie and Althea which resulted in the destruction of several of the trailers and the deaths of Leland and his group.
How long Al had been using the trailer park is unknown, but there was a sizable walker population locked inside several of the trailers by the Vultures.
After finding the "51" flag in Al's SWAT van, Alicia Clark, Victor Strand and Luciana Galvez demanded to be taken to the trailer park in an effort to find the Vultures. Al eventually agreed in exchange for their story, but the group abandoned their plan after finding a map on Ennis' corpse.