You can witness the infamous salmon run at the Locks.
Witnessing the salmon migration is one experience that should be on everyone's Seattle bucket list. In fact, these salmon swimming upstream is so mesmerizing, it's become an annual event in the city called Salmon Seeson. (Get it?)
During this time, you can watch thousands of salmon migrate up the fish ladder in Ballard Locks. Professional naturalists also provide daily talks throughout this celebration and offer free one-hour tours.