One Saturday, my DH and I decided to walk from Ballard across the locks to Magnolia, then up the north side of Queen Anne (scary dirt trail with homeless encampments) and down the other side to Westlake, then up Capitol Hill at Denny (stopped at Monsoon for dim sum), down through the Arboreteum, through U District to Ravenna Park, then to Green Lake, and up 73rd to Phinney Ridge (Ridge Pizza) and back down to Ballard. A little over 23 miles. Best part? Frequent food and coffee stops. Gotta keep the energy up!