I used to live in Ravenna neighborhood in Seattle. During that time, Maggie and I would run to the Green Lake, go all the way around and run back. This route was 5.7 miles and was a great way to start our day. Maggie loves to run around the Green Lake (squirrels!), and the part on the streets was not too bad either since we always went early in the morning before the rush hour. Some days, we would also go to the lake after work and go around again (we drove to the lake, and then walked around).
Most mornings, from our apartment, we ran west on N 65th Street then on Ravenna Boulevard to Green Lake Park. Once at the lake, we ran counter clock wise, came up the N 64th Street, and then go east on N 65th Street all the way back home.