NEW ORLEANS, July 11, 2005 /PRNewswire-FirstCall via COMTEX/ -- Hornbeck Offshore Services, Inc. (NYSE: HOS) announced today that it will release its second quarter 2005 results at approximately 6:00 a.m. Eastern on Thursday, August 4, 2005. In conjunction with the release, the Company has scheduled a conference call, which will be broadcast live over the Internet, on Thursday, August 4, 2005 at 10:00 a.m. Eastern (9:00 a.m. Central).

What: Hornbeck Offshore Second Quarter 2005 Earnings Conference Call

When: Thursday, August 4, 2005 at 10:00 a.m. Eastern (9:00 a.m. Central)

How: Live via phone -- By dialing (303) 262-2131 and asking for the Hornbeck Offshore call at least 10 minutes prior to the start time, or Live over the Internet -- By logging onto the web at the address below

Where: http://www.hornbeckoffshore.com, on the "IR Home" page of the "Investors" section of the Company's website

For those who cannot listen to the live call, a telephonic replay will be available through August 11, 2005 and may be accessed by calling (303) 590- 3000 and using the pass code 11034723. Also, an archive of the webcast will be available after the call for a period of 60 days on the "IR Home" page under the "Investors" section of the Company's website.

Hornbeck Offshore Services, Inc. is a leading provider of technologically advanced, new generation offshore supply vessels primarily in the U.S. Gulf of Mexico and select international markets, and is a leading transporter of petroleum products through its fleet of ocean-going tugs and tank barges primarily in the northeastern U.S. and in Puerto Rico. Hornbeck Offshore currently owns and operates a fleet of over 50 vessels, with 6 additional vessels under construction and/or planned for conversion. For more information, please visit the Company's website at http://www.hornbeckoffshore.com under the captions, "News" and "Investors."

Contacts: Jim Harp, CFO
Hornbeck Offshore Services 985-727-6802

Ken Dennard, Managing Partner
Lisa Elliott, Sr. Vice President
DRG&E / 713-529-6600

SOURCE Hornbeck Offshore Services, Inc.

Jim Harp, CFO of Hornbeck Offshore Services, +1-985-727-6802; or Ken Dennard,
Managing Partner, or Lisa Elliott, Sr. Vice President, both of DRG&E,
+1-713-529-6600

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