Here is a cool image that shows a profile of how deep the Great Lakes really are!
Great Lakes ranked by the average depth
Lake Superior: 483 ft (147 m) – Deepest Point is 1,333 ft (406 m)
Lake Ontario: 283 ft (86 m) – Deepest Point: 804 ft (245 m)
Lake Michigan: 279 ft (85 m) – Deepest Point: 925 ft (282 m)
Lake Huron: 195 ft (59 m) – Deepest Point: 748 ft (228 m)
Lake Erie: 62 ft (19 m) – Deepest Point: 210 ft (64 m)
