Seattle’s mild, temperate marine climate allows year-round outdoor recreation, including walking, cycling, hiking, skiing, snowboarding, kayaking, rock climbing, motor boating, sailing, team sports, and swimming. In town, many people walk around Green Lake, through the forests and along the bluffs and beaches of 535-acre (2.2 km2) Discovery Park (the largest park in the city) in Magnolia, along the shores of Myrtle Edwards Park on the Downtown waterfront, along the shoreline of Lake Washington at Seward Park, or along Alki Beach in West Seattle. Also popular are hikes and skiing in the nearby Cascade or Olympic Mountains and kayaking and sailing in the waters of Puget Sound, the Strait of Juan de Fuca, and the Strait of Georgia. In 2005, Men’s Fitness magazine named Seattle the fittest city in the United States.
from Wikipedia