TRIANGLE PETROL : Triangle Petroleum Announces Second Quarter 2011 Earnings and Conference Call

TRIANGLE PETROLEUM ANNOUNCES SECOND QUARTER 2011 EARNINGS AND CONFERENCE CALL

Denver, Colorado, September 6, 2011 – Triangle Petroleum Corporation (“Triangle” or the “Company”) (NYSE Amex: TPLM) has scheduled the release of its second quarter 2011 financial and operational results for Thursday, September 8, 2011.

Peter Hill, Chief Executive Officer, and Jonathan Samuels, President and Chief Financial Officer, of Triangle will host a conference call at 9:00 AM MT (11:00 AM ET) to provide an overview of the results and Triangle’s current position, followed immediately by a question and answer session.

Interested parties may dial-in using the conference call number [phone] (participant passcode #

97272762). International parties may dial-in using [phone].

A recording of the conference call will be available through September 15, 2011 at [phone] (participant passcode # 97272762). For international participants, the encore dial-in number is (404) 537-

3406.

About Triangle:

Founded in 2006, Triangle Petroleum Corporation is an independent oil and gas exploration company that

has acquired, or committed to acquire, approximately 72,000 net acres in the Williston Basin targeting the Bakken Shale and Three Forks Formations and approximately 475,000 gross acres (413,000 net acres) in the Windsor Block of Nova Scotia.

Contact:

Triangle Petroleum Corporation

Jonathan Samuels, President & Chief Financial Officer

303-260-7125 [e-mail]