Beautiful little mountain lake on the slopes of Mt. Hood. We did the 12-mile loop in two days from the trailhead below Shellrock Lake. There are some tough climbs but the Friday night we spent there was great. Looked like it was getting crowded when we left Saturday afternoon. The water is clear and amazingly warm, considering that it's glacier feed.
We didn't have to pay for the campsite, but you do need a Forest Pass or something to leave your car at the trailhead.