Geographical Names

[Inga]

Hi, everybody.
I know the rule that we don't use the definite article with lakes, e.g. Lake Naroch. But should I use it with the name of the lake without the word 'lake'? Should I say Naroch or the Naroch?
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I am an incurable optimist.

[Mister Micawber]

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No article. The Great Lakes are Erie, Superior, Ontario, Huron and Michigan.
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Native English teacher at Mister Micawber's

[Inga]

Thank you. Couldn't sleep for a long time.
_________________
I am an incurable optimist.