EXHIBIT 99.1

CANADIAN NATURAL RESOURCES LIMITED ANNOUNCES

HORIZON OIL SANDS PRODUCTION

CALGARY, ALBERTA – JUNE 30, 2010 – FOR IMMEDIATE RELEASE

Canadian Natural Resources Limited (“Canadian Natural” or the “Company”) announces monthly production of Synthetic Crude Oil (“SCO”) at Horizon Oil Sands as follows:

Month	SCO Production (bbl/d)
Q1 2010	86,995
April 2010	101,000*
May 2010	81,400*
June 2010 forecast	116,000-118,000
*rounded to the nearest hundred

The proactive maintenance during May 2010 was successfully completed. This resulted in exceptional reliability and production volumes in June 2010.

The Company targets stable production levels of approximately 110,000 barrels per day of SCO for the remainder of 2010 and will continue to complete strategic maintenance as required resulting in annual production guidance for 2010 remaining at 90,000 to 105,000 barrels per day of SCO at Horizon Oil Sands.

Canadian Natural is a senior crude oil and natural gas production company, with continuing operations in its core areas located in Western Canada, the U.K. portion of the North Sea and Offshore West Africa.

CANADIAN NATURAL RESOURCES LIMITED

2500, 855 – 2nd Street S.W.

Calgary, Alberta

T2P 4J8

Telephone: Facsimile: Email: Website:	(403) 514-7777 (403) 514-7888 ir@cnrl.com www.cnrl.com	JOHN G. LANGILLE Vice-Chairman STEVE W. LAUT President COREY B. BIEBER Vice-President, Finance & Investor Relations
Trading Symbol - CNQ Toronto Stock Exchange New York Stock Exchange

This document contains forward-looking statements under applicable securities laws, including, in particular, statements about Canadian

Naturals’ plans, strategies and prospects.  Although the Company believes that the expectations reflected in these forward-looking

statements are reasonable, such statements are subject to known or unknown risks and uncertainties that may cause actual

results to differ materially from those anticipated.  Please refer to the Company’s Interim Report or

Annual Information Form for a full description of these risks and impacts.