Riding my bike on the Burke-Gilman trail on the way to an art opening in Ballard recently, I stopped at "the Locks." Officially known as the Hiram M. Chittenden Locks. 

I have visited the locks on a few occasions since I was a kid to watch how boats transition from Puget Sound, (salt water) to Lake Union (fresh water.) This particular evening, illuminated by the light of dusk, offered an excellent opportunity to watch the boats arrive after a day at sea.