Simplify the following text for a Grade 5 native English-speaking person.
Original: These lakes are Lake Ontario , Lake Erie , Lake Huron , and Lake Superior .
Simplified: These are the Rainy River , Lake Superior , the St. Mary 's River , Lake Huron , the St. Clair River , Lake St. Clair , Lake Erie , the Niagara River , Lake Ontario , and along the St. Lawrence River from Kingston , Ontario to the Quebec boundary just east of Cornwall , Ontario .