Because it meant redoing more then just one thing. The Volcano, that's what I call the area surrounding the ground cause it sorta looks like the edge of a volcano from high up. Anyways the Volcano is not connected to the ground, their two separate meshes. It would mean modeling another item all over again. Not a task I wanted to do, especially after I redid the ground.
Believe me when I say I would have to redo that entire mesh from scratch. I have tried just modifying the current mesh, to where you couldn't get over the humps, but it looked downright awful when I was done. I might redo it from scratch sometime in the future if I feel like it, right now its not a pressing concern.