Holly Energy Partners Second Quarter 2013 Earnings Release and Conference Webcast

Holly Energy Partners, L.P. (NYSE: HEP) (the “Partnership”) plans to announce results for its quarter ending June 30, 2013 on July 30, 2013, before the opening of trading on the NYSE. The Partnership has scheduled a webcast conference on July 30, 2013 at 4:00 p.m. Eastern time to discuss financial results.

This webcast may be accessed at: https://event.webcasts.com/starthere.jsp?ei=1018662.

An audio archive of this webcast will be available using the above noted link through August 13, 2013.

About Holly Energy Partners, L.P.:

Holly Energy Partners, L.P., headquartered in Dallas, Texas, provides petroleum product and crude oil transportation, tankage and terminal services to the petroleum industry, including HollyFrontier Corporation, which currently owns a 39% interest (including a 2% general partner interest), in the Partnership. The Partnership owns and operates petroleum product and crude pipelines, tankage, terminals and loading facilities located in Texas, New Mexico, Oklahoma, Arizona, Washington, Kansas, Wyoming, Idaho and Utah. In addition, the Partnership owns a 75% interest in UNEV Pipeline, LLC, the owner of a Holly Energy operated refined products pipeline running from Salt Lake City, Utah to Las Vegas, Nevada, and related product terminals and a 25% interest in SLC Pipeline LLC, a 95-mile intrastate pipeline system serving refineries in the Salt Lake City, Utah area.