Pioneer Park. Photo credit: Peter Stevens, Flickr CC
Bonus: Pioneer Park
Enjoy a hike along flat trails under a thick tree canopy in the middle of Mercer Island at Pioneer Park. Even as the huge maple trees are nearly done dropping their leaves, cedars and other evergreens will keep you mostly dry as you explore this 113-acre park. Pioneer Park has three quadrants totaling about six miles of trails. In two of the sections, dogs are allowed to go off-leash, so keep an eye out if your kids are nervous around dogs. Need to bribe them with some playground time? Deane's Children's Park (also known as the Dragon Park) is a half-mile north and has a fabulous playground with a large covered area for picnicking.