ETS operates four weekday routes between downtown Eureka, Bayshore Mall, Henderson Center, Myrtletown, Cutten, and Pine Hill.

Fixed route public transportation in Eureka began in 1903, when the Humboldt Transit Company initiated electric streetcar service between downtown, Myrtle Avenue, Sequoia Park, and J Street.

[2] By 1940, however, the streetcar system was no longer profitable and was canceled in favor of motorized public transit.

On the last day of service, some Eureka residents burned a Humboldt Transit railcar in the streets, utterly destroying it.

In 1993, the city contracted J. Kaplan & Associates of Walnut Creek, CA, to restructure and market ETS, resulting in a four-route system.

[11] In 2003, Bayshore Mall replaced Henderson Center as the main non-downtown transfer point, resulting in substantial route changes.

[12] However, this geographically removed transfer point significantly increased trip times, and in 2005 it was switched back to the more central Henderson Center in a major revision that eliminated the Blue Route and increased overall speed thanks to shortened trips.

It currently services downtown Eureka, Broadway, Bayshore Mall, Henderson Center, Cutten, and Sequoia Park.

It services downtown Eureka, Broadway, Bayshore Mall, Henderson Center, Sequoia Park, St. Joseph and General hospitals, and Myrtletown.