Seattle, also known as the Emerald City, is one of the best running cities in the country. It is situated on a narrow isthmus between Pudget Sound and Lake Washington, with miles of water, mountains and city views.
It is also a very spread out city. If you’re there for work, you might be staying downtown, or in one of the major suburbs with large numbers of corporate office parks, such as Bellevue or Redmond. If downtown, the best running in Seattle, Washington is along the waterfront. There are lots of lovely lakes and bike paths out toward the University of Washington, and the tony suburbs of Bellevue and Redmond.
Seattle is also the 2nd hilliest city in the United States, and lies on seven hills, including Capitol Hill, First Hill, West Seattle, Beacon Hill, Magnolia, Denny Hill, and Queen Anne, so hill runs can definitely be accomplished here. The city additionally has over 5,540 acres of parkland so there is plenty of trail running available.