The Bob Weir-fronted Ratdog and the String Cheese Incident will co-headline 15 summer shows, including two at Colorado's famed Red Rocks Amphitheatre and a pair at New York's Radio City Music Hall.

The Bob Weir-fronted Ratdog and the String Cheese Incident will co-headline 15 summer shows, including two at Colorado's famed Red Rocks Amphitheatre and a pair at New York's Radio City Music Hall.

The jam bands will swap opening and closing duties nightly, save for the Red Rocks shows, where the Colorado-based SCI will finish both nights. Keller Williams will also be on board for the July 1 show there, with the Taj Mahal Trio on hand the next night.

Initially formed in 1995, Ratdog has been the primary outlet for Weir in recent years, especially as performance activities with his fellow surviving Grateful Dead members have become less frequent. The group recently completed a spring tour and is expected to announce a slate of additional shows in addition to the SCI dates.

Among the ever-busy String Cheese Incident's plans are two headlining sets at Minnesota's 10,000 Lakes Festival in July and several shows in Alaska prior to a trip across the Pacific to play Japan's 10th annual Fuji Rock Festival.

Here are the Ratdog/SCI tour dates:

June 24: Santa Margarita, Calif. (Pozo Saloon)
June 25: Los Angeles (Greek Theatre)
June 26: San Diego (Concerts in the Park)
June 28: Phoenix (Maricopa County Events Center)
June 30: Flagstaff, Ariz. (The Great Salt Air)
July 1-2: Morrison, Col. (Red Rocks Amphitheatre)
July 6: Milwaukee (Summerfest at Marcus Amphitheatre)
July 7: Kansas City, Mo. (Starlight Theatre)
July 8: St. Louis (Fabulous Fox Theatre)
July 10: Canandaigua, N.Y. (Finger Lakes Performing Arts Center)
July 11: Philadelphia (Penn's Landing)
July 13-14: New York (Radio City Music Hall)
July 15: Mansfield, Mass. (Tweeter Center for the Performing Arts)