Technically I suppose that you could try and make the case that a lake offers a beach.
- The shore of a body of water, especially when sandy or pebbly.
- The sand or pebbles on a shore.
- The zone above the water line at a shore of a body of water, marked by an accumulation of sand, stone, or gravel that has been deposited by the tide or waves.
That concludes this less than serious post. Hog farmers, sailors, math geeks, art majors and business people are dismissed.