I stayed at the Alta Lakes dispersed camping in late August 2017. There are I believe three lakes however I only checked out the first lake. It is roughly 11,100 ft and it can get chilly at night.
The sight was beautiful, I lucked out and got one tucked into the woods right on the edge of the water. It was a small sight and the ground was not level there was a slight incline and I kept sliding a toward the front of the tent at night. there are quite a few sites in the area, the road is a bit sketchy, like most areas of the San Juan range clearance is usually necessary and AWD is very helpful.
The water was almost glassy in the early morning and evening, A lot of fish in the water probably a great spot if you flyfish. Lots of birds as well and squirrels. I was camping alone but there were several other people around me I hung my hammock right at the edge of the water and it was still very peaceful. I did not see any large animals. I would camp here again.