The MV Tillikum is the sole remaining Evergreen State-class ferry operated by Washington State Ferries (WSF) and the oldest ferry operating in the WSF system. The Tillikum entered service in April 1959 for the Seattle–Bainbridge Island route. Upon the delivery of the Super-class ferry 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 ferry MV 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 become a reserve vessel since the delivery of the MV Samish in 2015. Since the retirement of her sister MV Klahowya in 2017, she has been serving primarily as the San Juan Inter-island vessel.