Southern Lord Records has announced the Power of the Riff Fest for 2011. So far 4 dates have been confirmed.

Los Angeles Aug 13 2011 @EcholPlex
Pentagram
Winter
Pelican
Trap Them
Masakari
Alpinist
Acephalix
All Pigs Must Die

San Francisco Aug 15 2011 @ The Elbow Room
Winter
Noothgrush
Trap Them
Black Breath
All Pigs Must Die
Acephalix
San Fransisco Aug 16 2011 @ Mezzanine
 Pentagram
 Pelican
 Alpinist
 Masakari
 Early Graves
 Baptists
 Aeges

Seattle Aug 18 2011 @ Neumos
WINTER
PELICAN
NOOTHGRUSH
All Pigs Must Die
Alpinist
Masakari and
Aeges