Watch: The Beatles play Red Rocks Amphitheater on August 26, 1964
YouTube/Abbey Road

Fifty years ago this August, the Fab Five invaded the U.S. for a second time, just months after they first stepped off a plane in New York City and were gleefully ambushed by 3,000 fans. This time they would embark on a historical 24-city North American tour, which started in San Francisco and concluded in New York City.

On August 26, 1964 The Beatles took the unique outdoor stage at the Red Rocks Amphitheater in Morrison, Colorado to perform for an audience of about 7,000 people. Denver was the sixth stop of the tour and sadly, Red Rocks is one of only four venues visited during the tour that's still in operation today.

While we will obviously never have the chance to see The Beatles together on stage again, Paul McCartney and Ringo Starr both continue to perform around the world with their respective bands, and each have upcoming U.S. dates. Click here for information on Paul McCartney's tour, or get upcoming dates for Ringo Starr and his All Starr Band.