Alt-rock outfit 311 will dominate the summer concert season with the fifth consecutive year of its Summer Unity Tour. This year's venture features The Offspring, as well as special guest Pepper, who were also special guests during the inaugural Summer Unity Tour in 2006.

Nearly 25 dates have been rolled out for the 2010 season, including two preliminary dates in Alaska on June 18 at The Blue Loon in Fairbanks and June 19 at Moose's Tooth in Anchorage. From there, 311 plunges back into the continental U.S. and joins up with its Summer Unity entourage for a stretch that opens June 24 at Lifestyles Community Pavilion in Columbus, OH, and ends July 25 at the Cricket Wireless Amphitheatre in Chula Vista, CA.

After wrapping a series of spring concerts across the U.S., rock-reggae crew 311 will launch its annual Summer Unity Tour with support from reggae artist Ziggy Marley and an unnamed special guest.

The 25-city jaunt kicks off with a June 5 show at Santa Barbara Bowl in Santa Barbara, CA, and closes out July 12 at Verizon Wireless Amphitheater in Irvine, CA. During the coast-to-coast circuit, the group will complete a June 12 concert at Red Rocks Amphitheatre in Morrison, CO, a June 25 performance in Central Park in New York, NY, and a July 4 show at Lakewood Amphitheatre in Atlanta, GA, among other dates.

SunFest, Florida's largest music, art and waterfront festival, will be held from April 29 through May 3, along sections of Flagler Drive in downtown West Palm Beach, FL. 311, James Taylor, David Cook, Classic Albums Live, UB40, G Love & Special Sauce, Spyro Gyra and Jack's Mannequin have been booked with more acts to be added. AEG Live SE is the producer.

Numerous ticketing options are available: one-day festival ticket ($29); two-day pass with early bird discount ($45); two-day pass (regular price $49); five-day pass early bird discount ($60); five-day pass regular price ($65). Early bird discount ends April 26.