It's 6100 feet up. Snow stays until late spring. Don't go too early.

An old post of mine...

If you really want a neat experience, take the boat to Wizard Island. I think you can buy tickets online.

[What the entire island looks like] ( http://i.imgur.com/V7LEv4m.jpg). Was formed from separate volcanic event waaay after lake was already there. You can take the morning boat and stay about 4 hours until afternoon boat picks you up. We brought a picnic and everything. [The "beach" we lounged at was just sharp lava rocks.] ( http://i.imgur.com/mriOiVH.jpg). Wear good shoes for the [trail] ( http://i.imgur.com/Z716JCt.jpg). To get to the boat its one mile up, one mile down. Just switchbacks, no rides.

[I made this.] ( http://i.imgur.com/J4iHMUh.jpg)