CLOSED: I'm guessing this a Great Egret.

While at the lake, looking at all the mallards and Canada Geese, I saw this large white bird.

I think it is a Great Egret, am I correct?

Hack

Here it is from the back.

yes

Thanks Donna.

Yep! The yellow bill helps tell it from Snowy Egret (black bill) when you can't make a good estimate of the size.

Resin

Thanks for the tip, Resin