MV Spirit of Kingston is a 65-foot (20 m), 149 passenger[2] passenger-only ferry owned and operated as part of the King County Water Taxi fleet.

[4] In early 2010 she was acquired by the Port of Kingston for their SoundRunner service via a $3.5 million Federal Transit Administration grant.

Two months after her acquisition by the KCFD, the Spirit of Kingston entered service on the West Seattle/Downtown Seattle route.

The Spirit of Kingston now serves as the backup vessel on the West Seattle/Downtown Seattle route, when the Doc Maynard or the Sally Fox goes out of service.

[4][9] She is powered by four 14 L Detroit Diesel Series 60 engines that produce a total of 740 horsepower (550 kW) and meet EPA Tier 3 emissions standards.