Part of the Northern Loop Trail in Mount Rainier National Park.
This was my favorite site on this entire trip. It is stunning.
Yellowstone Cliffs is located 12.4 miles from the trailhead and it is a difficult 12.4 miles. From Fire Creek, you go down, down, down, cross a river and then immediately go up, up, up. Once you reach the top, you know you are close, but you end up going down, down, down before you reach your campground.
The campground it located on the side of a seriously steep hill. But the views of the cliffs are incredible. There are only two single campsites and one group site at this campground. We got what I think is the best site, with an open view of the cliffs.
The open-air toilet is up the hill in the campground, closer to the other individual site.
On the other side of the campsite, if you are willing to try to find a trail (others have clearly gone before), there is a creek that is great for getting water, taking a quick dip, rinsing clothes (no soap please).
The sites are some what close together: we were right beside the group site but there was no group, so we lucked out. The other individual site is more separate.
There were trees but not many near us, which made it great for admiring the cliffs. Which, trust me, you will want to.