Riverdale was a town that was located presumably close enough to Springfield to require driving. Archie, Jughead, Reggie, and Moose lived there.
Homer Simpson once tried to visit the location, but after somehow offending the populace of the town, he was driven back to Evergreen Terrace by Archie, Jughead, Reggie, and Moose, and then thrown out of the car moments after Robert Terwilliger threw Bart Simpson back at the same location, with Moose also telling Homer to stay out of the community before driving off.
Behind the Laughter
Riverdale is actually the setting for Archie Comics' flagship comic series Archie, alongside Veronica and Betty and Jughead.