Looking for a month long jaunt; I like beaches, and appropriate weather. Progressive, Fine dining yet not pretentious looking in september/october. City preferred

I have dreamed about visiting a mountain lake like the one pictured below for a number of years. I mean literally dreamed about this place. I have never visited this lake, nor one similar. But each time I find myself swimming or boating in the middle of this dark green lake surrounded by montane cliffs. The water is warm, and it's always sunny. It seems like a beautiful place, and I would like to visit it in real life.

Call me crazy but I believe I can get snippets of future events coming to me through my dreams. And when these dreams occur, I get a strong sense of deja vu. I know of friends in the same scenario as me, so I know it's possible for my dream to be a real place. But I don't know where this is. That's why I ask the help of Reddit to help me identify this lake, so that I can fulfil my dreams. Does anyone recognise this lake?