Counting Crows have extended their summer tour, originally covering only the West Coast, with 11 new dates. The trek kicks off July 6 in San Diego and will travel as far as North Carolina before closing in San Diego on Sept. 7. The Crows are road-testing material from their forthcoming fourth Geffen/Interscope album, which is being produced by Dennis Herring and Cracker's David Lowery.

Meanwhile, Crows frontman Adam Duritz will be heard guesting on a track from ex-Whiskeytown principal Ryan Adams' next Lost Highway solo album. The album, "Gold," is due in late August or early September.

Here are Counting Crows' tour dates:
July 6: San Diego (Humphrey's)
July 7: Las Vegas (the Joint)
July 9-10, 12: Saratoga, Calif. (Historic Mountain Winery)
July 13: Livermore, Calif. (Wente Bros. Winery)
July 15: Kelseyville, Calif. (Konocti Amphitheater)
July 17: Portland, Ore. (Schnitzer Hall)
July 18: Woodinville, Wash. (Chateau Ste. Michelle)
July 20: Reno, Nev. (Reno Hilton)
July 21-22: Lake Tahoe, Nev. (Caesars Tahoe)
Aug. 21: Corpus Christi, Texas (Concrete Street Amphitheater)
Aug. 22: Austin, Texas (Backyard)
Aug. 24: San Marcos, Texas (University Auditorium)
Aug. 25: Huntsville, Texas (Bernard G. Johnson Auditorium)
Aug. 27-28: New Orleans (House of Blues)
Aug. 30: Orlando, Fla. (House of Blues)
Aug. 31: Myrtle Beach, S.C. (House of Blues)
Sept. 2: Virginia Beach, Va. (venue TBA)
Sept. 3: Davidson, N.C. (Belk Arena)
Sept. 7: San Diego (San Diego Street Scene)