The Mountain Range is the exit out of Peach Creek that is found only in the Ed, Edd n Eddy universe. It's possible that Peach Creek is situated within a large valley due to the fact that these big mountains are seen in the background. They are first shown in detail during "Cool Hand Ed" when Jonny 2x4 and The Eds were standing on the rooftop of Peach Creek Jr. High. These mountains appear to have ice caps on them, suggesting that the show does indeed take place near a windy and cold mountainous region of North America. They are seen closer up in "The Good, The Bad and The Ed" when Eddy and Rolf once had to jump off them in order to get the "Hairy Chest of Resilience Badge." It was also revealed that a train track runs right through it. It is possible this is the same mountain range in Cartoon Network Universe: FusionFall.
The top of the mountain range.
The cul-de-sac seen from the mountain range.
A section of the mountain range where the train goes through.
A spot where the railroad track forks in the mountain range.