Holly Energy Partners Second Quarter 2011 Earnings Release and Conference Webcast DALLAS, TX – Holly Energy Partners, L.P. (NYSE: HEP) plans to announce results for the quarter ended June 30, 2011 on July 28, 2011, before the opening of trading on the NYSE. The partnership has scheduled a webcast conference on July 28, 2011 at 4:00PM Eastern time to discuss financial results.

This webcast may be accessed at: http://www.videonewswire.com/event.asp?id=81146

An audio archive of this webcast will be available using the above noted link through August 10, 2011.

Holly Energy Partners, L.P., headquartered in Dallas, Texas, provides petroleum product transportation and terminal services to the petroleum industry, including HollyFrontier 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: M. Neale Hickerson, Vice President-Investor Relations Holly Energy Partners 214-871-3555