Cheshiahud Lake Union Loop
Circling this buzzing lake in the middle of the city gives you almost exactly a 10k. Mostly paved, it takes you past Gas Works and Lake Union Park. If you’re more into urban scenes and people watching -- rather than trees and squirrels -- this run will offer you views of the Space Needle and Downtown, and give you a chance to watch the seaplanes landing amid houseboats and bridges. It’s most convenient to get started at Gas Works Park at the north end of the lake and head east, hooking up with a portion of the Burke-Gilman Trail. This well-marked loop will take you across the Fremont Bridge, where a two-block detour can have you taking a trollfie before finishing up your run.
You’ll barely believe you’re still in the city when you start at Roanoke Park and head up Interlaken, where a swath of green trees will envelop you in a steep and winding road. However, you are most assuredly still in the city, so lookout for cars, as visibility around the curves is limited and the point of exercise is to live longer. When you need a quick but challenging jog, the pitch of Interlaken, gaining a few hundred feet of elevation in just about two miles, will do the trick.