Part of the Northern Loop Trail in Mount Rainier National Park.
Backcountry permit required. This is a great campsite. You do need to get a backcountry permit, and these can be hard to come by. It's about a nine mile hike in from Sunrise visitor center. Lots of elevation gain and loss, crossing a river, going around a glacier. The site is pretty buggy but there is a creek to filter your water. The lake is a .2 mile hike up from the campsite. So it's close… but it's all uphill. The lake was actually kind of warm when I went in and it was amazing to play in. And to use the sand to scrub off the sweat from the hike. There are biting ants by the lake, but I just jumped over them. Overall, a great spot!