I believe last year it had to fill up, and there wasn't really much Lupine to shoot last year either. This year it was already fairly full when the snow started melting. I also heard that they weren't able to drain much out of the lake yet because all the tributaries were flowing fast and the Truckee River (Tahoe's only outlet) is running fairly full, if they let too much out from the dam certain areas along the river flood. There are beach areas around the lake that have no beach this year.