The entire rally expansion should have been placed in that part of the map. It could have been in the game to begin with. I think the landscape is nearly identical
south-west side of the map at the blocked of area i've gone to the litteral end. it just cuts of after flying there with the cam set to fast for like 10 minutes. but after those hills end you can still go further on the "ocean bc that just stays around the mountians. after a while the hills get really low res , like ur running the game on an xbox 360