A cadre of hard rock acts led by Opeth, Unearth, Poison The Well and Clutch are uniting for the inaugural Sounds of the Underground summer festival tour. The bill will hit the road in North America in late June and run through late July.

With organizers promising the addition of a notable headlining act, others already confirmed for the full tour are From Autumn To Ashes, Chimaira, Norma Jean, Every Time I Die, Strapping Young Lad, Throwdown, High On Fire, Devil Driver, All That Remains, A Life Once Lost and veteran horrorcore group Gwar, which will present a "halftime show."

Madball has been drafted for the eastern half of the tour, with Terror picking up on Western dates. Regional additions include the Red Chord (East Coast), Fear Before The March Of Flames (Midwest, Southeast) and Himsa (West).

"This tour will show the masses that real music is alive and well," Unearth's Trevor Phipps says. "The Sounds of the Underground will prove that you don't need 'pop-culture' to embrace your sound and way of life."

The tour is being produced by Face the Music Touring agent Tim Borror, Ferret label executive/artist manager Paul Conroy, Ferret label owner Carl Severson and artist manager Larry Mazer. The group has pledged to keep ticket prices below $30.

Dates for the trek have not yet been announced. The Sounds of the Underground Tour Web site will launch soon with full details.