NE corner of California: 41.994612, -120.001006 Middle Island, in Lake Erie: 41.682534, -82.683679 (I was curious myself, so I went digging in Apple Maps.) (

NE corner of California: 41.994612, -120.001006 Middle Island, in Lake Erie: 41.682534, -82.683679 (I was curious myself, so I went digging in Apple Maps.) (Update: realized my NE corner coordinates were in fact a little inside the border, so grabbed ones even farther north.)