Even in winter, there are plenty of good hikes which are easy to get to from Seattle and are usually snow free. If you're looking for suggestions, the Seattle Times features 10 local trails to try this winter picked by the Trail Mix hiking club.
For example:
South Tiger Mountain
This hike is better in winter than in summer and offers views of Seattle, the Olympics and the Cascades. There’s not much hiker traffic. We do it as a loop, which makes it more interesting, about seven miles and under 2,000 feet of elevation gain. Traction devices are rarely needed.
Click over to the article for the full list and directions. You can also search for other hikes and trip reports on the Washington Trails Assocation website wta.org
Photo courtesy of Flickr user Monty VanderBilt