Alta Lake is a nice, clean park with decent tent sites. We had a site in Loop 2 on the right (on the lake side). It was away from the main area, parking lots, boat launch or store, so pretty quiet. Our site was sweet, it had a trail down to a small open sandy stretch of beach that was basically our own private beach. Took the cooler and a pop up tent and enjoyed the beach all day. We went in August and it was hot, the lake was super refreshing! (photo from WA State Parks & Rec commission)