According to the Sounds Of The Underground's official site, both DRAGONFORCE and HORSE THE BAND will be performing on select dates of this summer's tour. Sounds Of The Underground festival tour dates are as follows:

July
8 - Cleveland, OH at Plain Dealer Pavillion
9 - Chicago, IL at 1st Midwest Bank Amp. Parking Lot
11 - Toronto, ON at Molson Amphitheatre
12 - Montreal, QC at Metropolis
13 - Poughkeepsie, NY at Mid Hudson Civic Center
14 - Mansfield, MA at Tweeter Center Parking Lot (with KILLSWITCH ENGAGE)
15 - Sayreville, NJ at Starland Ballroom Outside
16 - Camden, NJ at Tweeter Waterfront (with VOD)
17 - Washington DC at Merryweather Pavillion
19 - Orlando, FL at Tinker Field
21 - Houston, TX at Verizon Wireless Theatre
22 - Corpus Christi, TX at Concrete St. Amphitheatre
23 - San Antonio, TX at Verizon Wireless Amp. Parking Lot
26 - Mesa, AZ at Mesa Amphitheatre (with SHADOWS FALL, IT DIES TODAY, STILL REMAINS)
27 - Las Vegas, NV at House Of Blues
28 - San Diego, CA at Venue Tba (with Shadows Fall, It Dies Today, Still Remains)
29 - Mountain View, CA at Shoreline Amp. Parking Lot
31 - Denver, CO at Universal Lending Pavilion

August
2 - Sauget, IL at Pop's Outside
3 - Sterling Heights, MI at Freedom Hill Amphithea
4 - Milwaukee, WI at Eagles Ballroom
5 - Minneapolis, MN at Roy Wilkins Auditorium
6 - Winnipeg, MB at Convention Centre
7 - Saskatoon, SK at Credit Union Center
8 - Edmonton, AB at Northlands Agricom
10 - Vancouver, BC at The Pne Forum
12 - Los Angeles, CA at Gibson Universal Amphitheatre