The American Lung Association is hosting a century (100 mile) scenic Ride Around the Sound event on September 15th, with shorter options for bicyclists of all experience levels and even a 12-mile Family Ride around the Alki Loop. The full century ride starts on Alki, winds through West Seattle all the way to Southworth, and returns on the ferry for a celebration feast (open to all riders) at South Seattle Community College. More about the cause, and registration, here.