Maximus Mighty-Dog Mueller II (May 6, 2013 – July 30, 2022) was a golden retriever dog who served as the second unofficial mayor of Idyllwild, part of the census-designated place of Idyllwild–Pine Cove, California.

Fourteen dogs and two cats ran, and Max, a Golden Retriever, was elected as Idyllwild's first mayor.

On April 2, 2013, Mayor Max died, and Maximus Mighty-Dog Mueller II, another Golden Retriever, arrived in Idyllwild on July 21 to complete the remainder of the term.

[4] In March 2014, as the end of Max's term approached, ARF solicited the town's interest in holding another election.

[8] Mayor Max died in the city of Temecula on July 30, 2022, after suffering a brief medical issue.