Thank you Larry, As it turns out Horseshoe lake sits directly above an active section of a volcano that produced Mammoth Mountain. The shores of this lake are DEAD because of the volcanic fumes. This photo is taken from a good 100 feet away from the shore. At some point in time I'll post a couple of photos of the dead trees near the shores.
"So I was sitting in my cubicle today, and I realized, ever since I started working, every single day of my life has been worse than the day before it. So that means that every single day that you see me, that's on the worst day of my life."
--Peter Gibbons (Office Space)