Mercer Slough. Photo credit: Liz Coleman, Flickr CC
A fantastic park for urban hiking, Mercer Slough Nature Park — just off I-90 in Bellevue — has more than 300 acres to explore. With kids in tow, it's best to start small and begin your visit at the Environmental Education Center on the park's eastern side. A visitor center perched in the trees like a treehouse is a good place to wait for the rain to let up (it's open daily from 10 a.m.–4 p.m.). Trails start just below the center and wind down the hillside to the flat wetlands where it's fun to try to spot wildlife.
Location: 1625 118th Ave. S.E., Bellevue
Editor's note: This article was originally published in 2014 and updated for 2019.