Webcast Alert: Ultra Petroleum Corp. First Quarter 2008 Results Conference Call

If you are unable to participate during the live webcast, the call will be archived on the Web site http://www.ultrapetroleum.com.

Ultra Petroleum Corp. is an independent exploration and production company focused on developing its long-life natural gas reserves in the Green River Basin of Wyoming -- the Pinedale and Jonah Fields. Ultra is listed on the New York Stock Exchange and trades under the ticker symbol "UPL". The company had 152,687,824 shares outstanding on March 31, 2008. Additional information can be found on the company on the Internet at http://www.ultrapetroleum.com.