Marshall Lieb is an American musician and songwriter, best known as a member of the 1960s band The Routers, which was prominent in the surf rock genre. The Routers are particularly recognized for their instrumental hits, including "Let's Go Trippin'" and "The Lonely Bull." Lieb's work with The Routers contributed to the popularization of surf music during a vibrant era for rock and roll. The band's energetic sound and catchy melodies helped shape the surf rock style that became synonymous with California culture in the 1960s. Although The Routers did not achieve the same level of fame as some of their contemporaries, they played a significant role in the evolution of instrumental rock music. After his time with The Routers, Lieb continued to be involved in music, contributing to various projects and collaborations. His work has been influential in the instrumental music scene, particularly in how it intersects with rock and surf music.