Burke-Gilman Trail is a 2.9 mile moderately trafficked out and back trail located near Seattle, WA that features a lake and is good for all skill levels. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail.
Gas Works Park has a play area with a large play barn, and big hill popular for flying kites. Special park features include a sundial, and a beautiful view of Seattle (http://www.seattle.gov/parks/park_detail.asp?id=293). Hours are 6 a.m. - 10 p.m. This 20 acre point on Lake Union was cleared in 1906 to construct a plant to manufacture gas from coal - later converted to crude oil. Import of natural gas in the 1950's made the plant obsolete. The city acquired the site for a park in 1962. The park was opened to the public in 1975. The boiler house has been converted to a picnic shelter with tables, fire grills and an open area. The former exhauster-compressor building, now a children's play barn, features a maze of brightly painted machinery (http://www.seattle.gov/parks/park_detail.asp?id=293).
Affectionately known as the "center of the universe" Fremont makes for a nice urban hike and Gas works park is a good starting point, and final destination.
I "urban hiked" from USCG Station Seattle all the way to Gas Works Park in Fremont just to watch the summer solstice parade in June (2014). I could have driven, but why bother when I have feet? This is only a 3-mile loop of a 14-mile round-tripper for me. What fun it was, but afterward my feet hurt. To be clear, I was a spectator. If you haven't ever been to the solstice parade, google it first for details, then go. Just. Go.