Lone Pine Resources Announces Resignation of Director22:00 EDT Friday, August 05, 2011 CALGARY, Alberta (Business Wire) -- Lone Pine Resources Inc. (“Lone Pine” or the “Company”) (NYSE:LPR; TSX:LPR) today announced that H. Clayton Peterson resigned from the Company's board of directors on August 4, 2011. Lone Pine Resources Inc. is engaged in the exploration and development of natural gas and light oil in Canada. Lone Pine's principal reserves, producing properties, and exploration prospects are located in Canada in the provinces of Alberta, British Columbia, and Quebec and the Northwest Territories. Lone Pine Resources Inc.David Anderson, 403-292-8000President & Chief Executive OfficerorEd Bereznicki, 403-292-8000Executive Vice President & Chief Financial Officer