A Seattle Running Store

From Sound Sports, the most straight forward way
to get to the Washington Arboretum is to run east on
Madison until you reach the entrance to the park.
(You'll run up a very big hill, down a few hills, and the
park entrance will be on your left). Alternatively (as
shown) you can take a left on 11th, and follow that to
Volunteer park. From Volunteer park, run down
Galer, until you get to the intersection of Galer and
Interlaken. There is a trail on the left. Follow this trail
down a few stairs, and take the first trail to the right.
This will bring you down to Interlaken Blvd, which you
can follow all the way down the the Washington
Arboretum.