STR Sitio Royalties Corporation

Questar Corp. (NYSE: STR) will host a teleconference and Webcast to discuss third-quarter 2008 results beginning at 9:30 a.m. EDT (7:30 a.m. MDT) on Thursday, October 30, 2008. Keith Rattie, Questar chairman, president and CEO, and Stephen Parks, senior vice president and CFO, will make presentations. Questar plans to issue its third-quarter 2008 earnings release Wednesday, October 29, 2008. Interested persons may listen to the Webcast online at the Questar Web site, www.questar.com. A podcast will also be available for download following the Webcast at www.questar.com. A replay of the teleconference will be available on the Web site, accessed by clicking on Investors, News & Events, Conference Calls and Audio. A telephone audio replay will be available from October 30 to November 1, by calling 800-642-1687 domestically or 706-645-9291 internationally, then pressing 30564719. Questar is a natural gas-focused energy company with about $8 billion in enterprise value. Headquartered in Salt Lake City, Questar engages in gas and oil development and production; gas gathering, processing and marketing; interstate gas transmission and storage; and retail gas distribution.