Must seePhoto by Ursacascadia on Wikimedia Commons
Hiram M. Chittenden Locks
Watch boats rise and fall between Puget Sound and the freshwater lakes, then find salmon climbing the 21-step fish ladder.
You're standing above concrete chambers that move boats between two kinds of water. To the west, Puget Sound runs tidal and salty. Behind you, Salmon Bay and Lake Union hold freshwater. The two locks do the negotiating: the small one is 30 feet wide and 150 feet long, and the large one stretches 825 feet.
Watch a boat settle as the chamber drains, then head to the fish ladder on the south side. Salmon climb it in 21 steps, weir by weir, and an underground window lets you see them nose into the current. This ladder sits where salt and fresh water meet, which is rare. The Army Corps of Engineers finished the whole complex in 1917 and named it for Major Hiram Chittenden.
Building it lowered Lake Washington about nine feet and dried out a thousand acres of wetlands. Today these locks move more boats than any other lock in the country, and sockeye, chinook, and coho salmon still pass through every summer and fall.







