Made our way from Seattle and got to the trail head around 9am. There were quite a few cars there already, but we had no issues with congestion on the way up. The trail is a nice combination of in the trees and then popping out into the open at times with beautiful views of the north Cascades. Several waterfalls along the way make for nice little stopping points and after only about 2.7 miles you open up to beautiful Lake Twenty-two. Its a gorgoeous site with the lake in the forefront and massive rock behind it. Still some some at the top, though you are able to walk to the end of the boardwalk without issue.
On the way down is where is crowds really started. In typical Saturday fashion there was a lot of people making their way up. People hiking alone or in pairs to some groups of 10 or more people. It was fairly consistent our whole way down.
While I would consider the hike easy, mildly strenuous, we did have some people as us at about a mile from the start if there were almost there and were a little discouraged when we said unfortunately not. :)