Take Exit 47 off I-90 and follow the signs to the Asahel Curtis Picnic Area. Despite the proximity to I-90, the area is nestled next to the Snoqualmie River and sits under lush Evergreens. The picnic area makes an excellent respite from civilization, and there is a nice, short nature trail that starts at the picnic area, wanders through several streams, runs along the Snoqualmie River, and bypasses several large, interesting trees. It even runs back under I-90.
My kids love this area and eagerly take on the trail, which goes out about a third of a mile before ending at the Asahel Curtis Nature Area.