Bear Lake

Bear Lake is a lake in Elwood City. Part of it is in Southwest Elwood City and part of it is in Northwest. It has a beach and it is sourrounded by mountains. There are usually a lot of people on it, and dogs are allowed on the beach because in the episode "D.W. All Wet" there was a dog on a leash on the beach of the lake. There is a raft in the water of the lake that you can jump off of. D.W. was afraid to go in it because she thought that there would be octopuses. Arthur and Buster were teasing her with it acting like Buster's bathing cap was an octopus. It's first appearence was in "D.W. All Wet" Across from it there is an island "Button Island" It is also close to World's End Park.

Real life inspiration
It is a rather common name for a lake. There are several Lakes with the name "Bear" You can see them here.