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Crimson Exploration, Inc. Announces Successful Drilling Results in San Augustine and Liberty Counties, Texas

Mr. Allan D. Keel, Crimson's President and CEO, stated, "With the successful completion of the Grizzly #1 well, Crimson has validated the reserve potential of the Mid Bossier Shale in its Bruin Prospect Area." Mr. Keel went on to say "based on well performance, we could have flowed the Grizzly well at significantly higher rates but have decided to use industry-best practices for reservoir optimization to maximize ultimate recovery." With respect to the recent successes in the Schwarz #2 and Catherine Henderson A-7 wells, Mr. Keel said, "The successful execution of our Liberty County drilling program continues to provide Crimson with the production and cashflow base that allows us to continue our Haynesville and Eagle Ford Shale development as well as pursue additional growth opportunities within our deep inventory of lower risk, high quality conventional prospects."

The 11.5 MMcfd test rate on the Grizzly well is reflective of Crimson's strategy that restricting rate and pressure drawdown on Haynesville and Mid Bossier Shale wells increases the Estimated Ultimate Recovery (EUR), results in a shallower and more stable decline curve, and delays the need for costly compression. Crimson adopted this strategy based on the experience attained by other operators in this trend, core studies that substantiate the loss of fracture conductivity at higher initial drawdown rates, and service company studies that indicate potential pinching off of available reservoir at higher production rates. Data from wells produced at restricted rates in the trend suggest that although this methodology provides lower production in the first few months of flow, the cumulative production curve compared to higher rate wells crosses in less than a year with the restricted rate wells flowing at higher rates and pressures at the point they cross, substantiating the belief that EUR is benefited at little to no loss of present value.

Since Crimson has chosen not to increase the rate on the Grizzly well above its current level, the company is providing two graphs which illustrate the performance and strength of this well to date.

Crimson now has three logged pilot holes in the Bruin Prospect area and is extremely encouraged by their results. The Mid Bossier Shale and Haynesville Shale gross thicknesses are approximately 300' and 160', respectively, and have rock qualities similar to those seen in the Haynesville Shale in the Louisiana Core area. The James Lime is similar in quality and thickness to that being actively developed in the County Line Field to the northwest.

Crimson currently continues to drill in the lateral section of the Gobi #1 (70% WI) in the Bruin Prospect Area. Completion operations are expected to begin in October. The Bengal #1 (37.5% WI), our first well in Crimson's Tiger Prospect Area in Sabine County, is expected to spud in early September. The Halbert Trust #1 (29% WI) in our Fairway Farms Prospect Area in San Augustine County is expected to commence completion operations in October.

In Bee County, Texas, the Windham #1 test (20% WI) of the Eagle Ford Shale formation is currently drilling and is expected to be completed by mid October.

In Liberty County, the Catherine Henderson A-8 (66% WI) well is nearing its proposed total depth of 13,500 feet and appears successful based on preliminary mud log analysis. Once drilling and completion operations are finished, we anticipate first production by early September.

Crimson Exploration is a Houston, TX-based independent energy company engaged in the acquisition, development, exploitation and production of crude oil and natural gas, primarily in the onshore Gulf Coast regions of the United States. The Company owns and operates conventional properties in Texas, Louisiana, Colorado and Mississippi, approximately 12,000 net acres in the highly prospective Haynesville Shale, Mid-Bossier, and James Lime plays in San Augustine and Sabine counties in East Texas, approximately 8,800 net acres in the prospective Eagle Ford play in South Texas and approximately 11,000 net acres in the Denver Julesburg Basin of Colorado.

Additional information on Crimson Exploration Inc. is available on the Company's website at http://crimsonexploration.com.

This press release includes "forward-looking statements" as defined by the Securities and Exchange Commission ("SEC" ). Such statements include those concerning Crimson's strategic plans, expectations and objectives for future operations. All statements included in this press release that address activities, events or developments that Crimson expects, believes or anticipates will or may occur in the future are forward-looking statements. These statements are based on certain assumptions Crimson made based on its experience and perception of historical trends, current conditions, expected future developments and other factors it believes are appropriate under the circumstances. Such statements are subject to a number of assumptions, risks and uncertainties, many of which are beyond Crimson's control. Statements regarding future production, revenue and cash flow are subject to all of the risks and uncertainties normally incident to the exploration for and development and production of oil and gas. These risks include, but are not limited to, commodity price changes, inflation or lack of availability of goods and services, environmental risks, drilling risks and regulatory changes and the potential lack of capital resources. Investors are cautioned that any such statements are not guarantees of future performance and that actual results or developments may differ materially from those projected in the forward-looking statements. Initial production rates stated in this release are expected to differ substantially from longer term average production rates. Forward looking estimates of production growth assume drilling results comparable to recent prior periods, which may not be realized. Please refer to our filings with the SEC, including our Form 10-K for the year ended December 31, 2009, for a further discussion of these risks.

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Crimson Exploration Inc., Houston, TX
E. Joseph Grady, 713-236-7400