Holly Energy Partners First Quarter 2010 Earnings Release and Conference Webcast DALLAS, TX – Holly Energy Partners, L.P. (NYSE: HEP) plans to announce results for the quarter ended March 31, 2010 on April 29, 2010, before the opening of trading on the NYSE. The partnership has scheduled a webcast conference on April 29, 2010 at 4:00PM Eastern time to discuss financial results.

This webcast may be accessed at: http://www.videonewswire.com/event.asp?id=68092

An audio archive of this webcast will be available using the above noted link through May 13, 2010.

Holly Energy Partners, L.P., headquartered in Dallas, Texas, provides petroleum product transportation and terminal services to the petroleum industry, including Holly Corporation, which owns a 34% interest in the Partnership. The Partnership owns and operates product pipelines and terminals primarily in Texas, New Mexico, Oklahoma, Arizona, Washington, Idaho and Utah.

FOR FURTHER INFORMATION, Contact:

Bruce Shaw, Senior Vice President and Chief Financial Officer

M. Neale Hickerson, Vice President-Investor Relations

Holly Energy Partners 214-871-3555