The itinerary includes double nights at Los Angeles, Berkeley and New York City, where the two stars will play Rumsey Playfield in Central Park. Other outdoor stops include the Red Rocks Amphitheatre in Morrison, Colo., and the Bank of America Pavilion in Boston.

The tour is to run for more than a month, finishing September 14 at World’s Fair Park in Knoxville, Tenn.

Harper, who is supporting his new album Both Sides Of The Gun, will be on the road throughout the world prior to the August/September trek. He’s currently in the midst of a Colorado run, which he’ll follow with two Hawaii shows as part of the Kokua Festival.

Then it’s off to Australia for two weeks in May, followed by the Sasquatch Festival and tours of Japan and Europe.

Marley, riding high on his 2005 smash Welcome To Jamrock, will visit Australia in April before hitting Coachella, Bonnaroo and the U.K.