The Boulder Garden Loop trail is a pretty and intriguing forest view hike that can be an outing in itself or part of a longer hike up Little Si trail and the Old Mt Si trail. The Little Si trailhead starts on the northeast side of the town of North Bend, eventually connecting to the offshoot Boulder Garden Loop trail. There are good signs throughout. Total roundtrip is about 2.5 miles, and it includes over 800 feet of elevation gain.
The moss-covered granite formations are quite magical, jutting up from the forest floor and providing great nooks and crannies for both kids and adults to explore. The trail is well maintained. It provides fun exploring of quiet geology and gentle trees.
Links:
Boulder Garden Loop
North Bend