Dave Mustaine and Megadeth will return to headline Gigantour when it launches in the northeast. From there, they’ll work their way across America and wrap up in mid-October. The bill that includes fellow heavy-hitters Lamb Of God, plus Opeth, Arch Enemy, Overkill, Into Eternity, Sanctity and The Smashup all confirmed for these mostly outdoor shows. More second stage acts are still to be announced.
Here is what the tour plans look like.. subject to change

9/7 – San Diego, CA at TBA
9/8 – Oakland, CA at Oakland Coliseum
9/9 – San Luis Obispo, CA at Pozo Saloon Amphitheatre
9/10 – San Bernardino, CA at Hyundai Pavilion
9/12 – Las Vegas, NV – TBA
9/13 – Phoenix, AZ at Dodge Theatre
9/15 – Salt Lake City, UT at USANA
9/16 – Denver, CO at Coors Amphitheatre
9/17 – Albuquerque, NM at Journal Pavilion
9/19 – TBD
9/21 – Milwaukee, WI at Eagles Ballroom
9/22 – Chicago, IL at Congress Theatre
9/23 – Columbus, OH at Nationwide Arena
9/24 – Detroit. MI at DTE Energy Amphitheatre
9/25 – Toronto, ONT at Molson Amphitheatre
9/27 – Montreal, QC atBell Centre
9/28 – Nassau at Nassau Coliseum
9/29 – TBD
9/30 – HolmdelNJ at PNC Bank Center
10/1 – TBD
10/3 – TBD
10/5 – TBD
10/6 – Tampa, FL at St Pete Times Forum
10/7 – Orlando, FL at Hard Rock Live
10/8 – Sunrise, FL at Bank Atlantic Forum

http://www.antimusic.com/news/06/july/2408.shtml