PRIMUS will join forces with MASTODON for a late spring/early summer tour of the U.S. Kicking off May 6 at Red Rocks, the trek will cross the country and back, with stops at Austin 360 Amphitheater, The Fox in Atlanta, Coney Island Amphitheater in Brooklyn, Northerly Island in Chicago, Greek Theaters in San Francisco and Los Angeles and many more before ending July 7 in Phoenix.

Pre-sale tickets start Tuesday, January 30 local time (password: Goblins) and general onsale is Friday, February 2.

PRIMUS's ninth studio album, "The Desaturating Seven", led the band back to some of the sounds and styles of its earlier days and has received praise from Consequence Of Sound, Rolling Stone, AV Club and more. The album marks the return of the definitive PRIMUS lineup — singer/bassist Les Claypool, guitarist Larry "Ler" LaLonde and drummer Tim "Herb" Alexander — for its first album of original music since 1995.

Inspiration for the album came from a 1978 children's book called "The Rainbow Goblins" by the Italian author and artist Ui de Rico. In the story seven goblins come to the valley where rainbows are born, intending to steal the rainbows and eat them. The valley, though, knows that the goblins are coming, and makes a plan to thwart the wicked creatures by hiding the rainbow. After the goblins are caught in their own nets, the flowers release the colors of the rainbow and drown the goblins, and in gratitude, the rainbow turns the flowers into beautiful birds who fly across the valley in freedom.

"It's a story about gluttonous individuals sucking the colors out of the world," says Les Claypool. "The overuse of resources by the greedy elite, and how the meek masses can overcome them in the end by unifying. It seemed pretty relevant these days."

PRIMUS tour dates:

May 06 - Morrison, CO - Red Rocks Amphitheater

May 08 - Oklahoma City, OK - The Criterion

May 10 - Dallas, TX - Southside Ballroom

May 11 - Austin, TX - Austin 360 Amphitheater

May 12 - Rogers, AR - Walmart Arkansas Music Pavilion

May 14 - Birmingham, AL - BJCC Concert Hall

May 15 - Nashville, TN - Nashville Municipal Auditorium

May 16 - Atlanta, GA - Fox Theater

May 18 - Portsmouth, VA - Portsmouth Pavilion

May 19 - Charlotte, NC - Charlotte Metro Credit Union Amphitheatre

May 20 - Raleigh, NC - Red Hat Amphitheater

May 22 - Reading, PA - Diamond Credit Union Theater @ Santander

May 23 - Lewiston, NY - Artpark Amphitheater

May 25 - Glen Falls, NY - Cool Insuring Arena

May 26 - Providence, RI - Bold Point Park

May 27 - Portland, ME - [to be announced]

May 29 - Boston, MA - Blue Hills Bank Pavilion

May 30 - Philadelphia, PA - Penn’s Landing - Festival Pier

Jun. 01 - Asbury Park, NJ - Stone Pony Summerstage

Jun. 02 - Baltimore, MD - Pier 6 Pavilion

Jun. 03 - Brooklyn, NY - Ford Amphitheater @ Coney Island Boardwalk

Jun. 05 - Columbus, OH - Express Live! Outdoor Amphitheatre

Jun. 06 - Chicago, IL - Huntington Bank Pavilion at Northerly Island

Jun. 08 - Pittsburgh, PA - Stage AE

Jun. 09 - Sterling Heights, MI - Michigan Lottery Amphitheater at Freedom Hill

Jun. 10 - Indianapolis, IN - Farmer’s Bureau Insurance Lawn at White River State Park

Jun. 12 - Cincinnati, OH - PNC Pavilion at Riverbend Music Center

Jun. 14 - Minneapolis, MN - MYTH LIVE

Jun. 15 - Bonner Springs, KS - Providence Medical Center Amphitheater

Jun. 16 - Camdenton, MO - Ozarks Amphitheater

Jun. 18 - Lincoln, NE - Pinewood Bowl Theater

Jun. 21 - Bonner, MT - Kettlehouse Amphitheater

Jun. 22 - Seattle, WA - Marymoor Park

Jun. 23 - Bend, OR - Les Schwab Amphitheater

Jun. 25 - Troutdale, OR - Edgefield

Jun. 28 - Avila Beach, CA - Avila Beach Resort Amphitheater

Jun. 29 - Berkeley, CA - The Greek Theatre

Jun. 30 - Lincoln, CA - Thunder Valley Resort Casino

Jul. 02 - Salt Lake City, UT - The Great Salt Air - Outdoors

Jul. 03 - Las Vegas, NV - Downtown Event Center

Jul. 05 - Los Angeles, CA The Greek Theatre at UC Berkeley

Jul. 06 - San Diego, CA - Cal Coast Credit Union Open Air Theater

Jul. 07 - Phoenix, AZ - Comerica Theatre