The first of our June UCR Hall of Fame Semifinal round matches finds two legendary California-based bands -- the Doors and Creedence Clearwater Revival --  pitted against each other. Each month, our readers will determine which of eight legendary artists or bands is immortalized forever for their contributions to classic rock history.

The Doors -- who defeated the Band by a two-to-one margin in round one last week, and who have been the runner-up in the last two UCR Hall of Fame elections -- emerged from Los Angeles and took the world by storm with their self-titled debut album in 1967. They reigned as one of rock's most successful, unique and mysterious bands up until the death of frontman Jim Morrison in 1971.

About the same time, Creedence Clearwater Revival emerged from the San Francisco music scene and helped lead a massive roots-revival movement in rock music. Much like the Doors, they were only together a brief amount of time, but a look (and listen) to our list of Creedence Clearwater Revival's Top 10 Songs shows just how much they accomplished together. They defeated Deep Purple by a very narrow 51% to 49% score in round one.

As you can see, both groups are extremely important to the history of classic rock. Which of the two advances to the finals is up to you. Readers can vote once a day from now until 11:59PM ET on June 23. You can read the Hall of Fame’s official rules right here. Be sure to mark your calendars for July 1, when the next entrant into the Ultimate Classic Rock Hall of Fame is revealed.

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