McKendree Spring is an American folk-rock band that was active mainly during the 1960s and 1970s. The band, consisting of notable members Fran McKendree, Martin Slutsky, Michael Dreyfuss, and Fred Holman, was known for their unique fusion of folk, rock, and classical elements. They are particularly recognized for their distinctive use of the electric violin, an innovation that set them apart in their genre. Their most influential work includes the album "McKendree Spring 3," which incorporated socially conscious lyrics and complex arrangements.