The Tillikum was built in 1959 for service between Seattle and Bainbridge Island. Upon the delivery of the Super-class ferries in 1968, the Tillikum was moved to the Edmonds-Kingston run where it remained until approximately 1980. After being displaced by the Issaquah-class ferry Chelan in the early 1980s, the Tillikum spent roughly a decade as a relief boat before settling on the Fauntleroy-Vashon-Southworth run in the early 1990s. The Tillikum has been a reserve vessel since the delivery of the Samish in 2015. She can currently be found working as the fourth boat on the Anacortes-San Juan Islands-Sidney route.