It's like thigh deep. I fell in it once. When I was younger of course.
Not sure how deep the lake is but this is a city lake, playgrounds are all around so I don't imagine that it's more than 4ft.
Don't know however it's murky and dirty
I'm just estimating. It's not terribly deep. I would be surprised if the deepest part is 4 or 5 feet deep at most.
Or more
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