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Notes to Non-Reserves -- Inferred Mineral Resources:
(1) The Mineral Resources for Bogoso/Prestea include Pampe and Mampon.
(2) The Mineral Resources were estimated in accordance with the definitions and requirements of Canada's National Instrument 43-101. The Mineral Resources are equivalent to Mineralized Material as defined by the SEC Industry Guide 7.
(3) The Mineral Resources were estimated using optimized pit shells at a gold price of $1,750 per ounce from which the Mineral Reserves have been subtracted. Other than gold price, the same optimized pit shell parameters and modifying factors used to determine the Mineral Reserves were used to determine the Mineral Resources. In 2011, we used a gold price of $1,500 per ounce for the optimized shell. The Prestea Underground resource was estimated using a $1,750 per ounce gold price and operating cost estimates using an economic gold cut-off of 3.0 g/t.
(4) The Mineral Resources are not included in and are in addition to the Mineral Reserves described above.
(5) The Qualified Person reviewing and validating the estimation of the Mineral Resources is S. Mitchel Wasel, Golden Star Resources Vice President of Exploration.
(6) Numbers may not add due to rounding.
(7) The Father Brown Underground Resource has been estimated below the $1,750 per ounce of gold pit shell using an economic gold grade cut-off of 2.9 g/t, which the Company believes would be the lower cut-off for underground.

QA/QC:

The technical contents of this press release have been reviewed by S. Mitchel Wasel, BSc Geology, a Qualified Person pursuant to National Instrument 43-101. Mr. Wasel is Vice President Exploration for Golden Star and an active member of the Australasian Institute of Mining and Metallurgy.

The results for Wassa/HBB quoted herein are based on the analysis of saw-split HQ/NQ diamond half core or a three kilogram single stage riffle split of a nominal 25 to 30 kg Reverse Circulation chip sample which has been sampled over nominal one meter intervals (adjusted where necessary for mineralized structures). Sample preparation and analyses have been carried out at SGS Laboratories in Tarkwa using a 1,000 gram slurry of sample and tap water which is prepared and subjected to an accelerated cyanide leach (LEACHWELL). The sample is then rolled for twelve hours before being allowed to settle. An aliquot of solution is then taken, gold extracted into Di-iso Butyl Keytone (DiBK), and determined by flame Atomic Absorption Spectrophotometry (AAS). Detection Limit 0.01ppm.

The results for Bogoso/Prestea herein are based on the analysis of saw-split HQ sized (64mm) diamond half core or a three kilogram single stage riffle split of a nominal 25 to 30 kg Reverse Circulation chip sample which has been sampled over nominal one meter intervals (adjusted where necessary for mineralized structures). Sample preparation and analyses have been carried out at SGS Laboratories in Tarkwa using a 50 gram assay charge with a flame Atomic Absorption Spectrophotometry (AAS) finish and a detection limit of 0.01 ppm.

All analytical work is subject to a systematic and rigorous Quality Assurance-Quality Control (QA-QC). At least 5% of samples are certified standards and the accuracy of the analysis is confirmed to be acceptable from comparison of the recommended and actual "standards" results. The remaining half core is stored on site for future inspection and detailed logging, to provide valuable information on mineralogy, structure, alteration patterns and the controls on gold mineralization.

Company Profile

Golden Star holds a 90% equity interest in Golden Star (Bogoso/Prestea) Limited and Golden Star (Wassa) Limited, which respectively own the Bogoso/Prestea and Wassa/HBB open-pit gold mines in Ghana. In addition, Golden Star has an 81% interest in the currently inactive Prestea Underground mine in Ghana, as well as gold exploration interests elsewhere in Ghana, in other parts of West Africa and in Brazil in South America. Golden Star has approximately 259 million shares outstanding.

Statements Regarding Forward-Looking Information:

Some statements contained in this news release are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and under Canadian securities laws. Such statements include the Company's expectations regarding reserves and resources changes for 2013, the timing for updating resource models in 2013, the timing of undertaking and publishing a pre-feasibility study for the Wassa Expansion Project, the timing of the completion of the West Reef feasibility study and its impact on Mineral Reserves, our 2013 exploration activities and the number of drill rigs conducting such exploration, and our plans for processing refractory ore and non-refractory ore. Investors are cautioned that forward-looking statements are inherently uncertain and involve risks and uncertainties that could cause actual facts to differ materially. There can be no assurance that future developments affecting the Company will be those anticipated by management. Please refer to the discussion of these and other factors in our Form 10-K for 2012. The forecasts contained in this press release constitute management's current estimates, as of the date of this press release, with respect to the matters covered thereby. We expect that these estimates will change as new information is received. While we may elect to update these estimates at any time, we do not undertake any estimate at any particular time or in response to any particular event.



For Further Information, Please Contact:

GOLDEN STAR RESOURCES LTD.
Bruce Higson-Smith
Senior Vice President Corporate Strategy
1-800-553-8436

INVESTOR RELATIONS
Jay Pfeiffer
Pfeiffer High Investor Relations, Inc.
303-393-7044

Belinda Labatte
The Capital Lab, Inc.
647-427-0208