Chain Lakes Loop Trail Professional Review and Guide
"Looped day hikes—always a plus because every step is one through new territory—are hard to come by in the Mount Baker–Mount Shuksan area, which is probably why the Chain Lakes Loop is so popular. That and the scenery, which includes a little bit of everything that you could want in a North Cascades hike.
There are the titular big mountains, of course, plus wildflower and blueberry meadows, scree (loose rock) slopes, lava cliffs, a high-alpine traverse with expansive unobstructed Cascade views and permanent snowfields, not to mention the peaceful, contemplative kettle lakes for which the trail is named. In the too-short era of the Mount Baker Lodge (1927–1931), pack horses would follow this loop as they took visitors on fishing excursions to the Chain Lakes."