Arizona native son Marshall Trimble began his career as a folk singer in the 1960's with the Gin Mill Three. In 1972 he formed another folk group, Donnery and Rudd. His first book, "Arizona" was published by Doubleday and Co. in 1977. He returned to the stage, this time as a solo act, performing as a cowboy singer, storyteller, and poet. Today he is one of the state's most popular entertainers. He appears frequently on radio and television as a goodwill ambassador for the state. In 1997 the governor of Arizona appointed him Official Arizona State Historian.

Trimble is the author of nineteen books on Arizona and the West. He writes a monthly column, "Ask the Marshall" for True West Magazine. He's the spokesman for Saba's Western Stores and Prescott's famed Palace Restaurant and Saloon. He is heard on radio stations around Arizona with his short stories called Trimble’s Tales and his short programs and hour-long programs featuring aspects of Arizona.

Marshall has taught Arizona and Southwest history, music and folklore at Scottsdale Community College since 1972 and is recognized as the dean of Arizona historians. In 2000 he was selected as one of the states representatives in the Library of Congress Honors program, Local Legacies. Marshall can also be heard on KMYL Phoenix, KVNA Flagstaff, KRXS Globe and KBSZ Wickenburg with Trimble’s Tales and hour long stories of Arizona.