Fountain Green was a pre-War town in Sanpete County, Utah.
Background
In 2084, Randall Clark spotted the tracks of three men heading towards the town as he was returning from his trip to Salt Lake City. He considered following their trail, but decided against it, arguing they were just as likely to be cannibals as friendly.[1][2]
Appearances
Fountain Green is mentioned only in the Fallout: New Vegas add-on Honest Hearts.
Behind the scenes
Fountain Green is based on the real world location of the same name, a small town in Utah.