April 27 2008 King's Bay Gold Corporation (TSX.V: KBG) and Mainstream Minerals Corporation (TSX.V: MJO) are pleased to announce that they have received additional results from Hole # 25 at their joint-venture Bobjo Mine Project, located in Earngey and Agnew Townships, South Bay area, Red Lake, Ontario.

Results Confirm Extension of Zones

Depth Extension of Gold Zone

Rare Metals and Rare Earth Elements now found within Gold Bearing Quartz Vein

This project continues to be the site of new discoveries that has so far included high-grade gold, strategic rare metals and rare earth elements. The partners recently reported the discovery of a new high-grade gold zone located approximately 150 metres south of the main zones at a depth of 291.0 to 293.0 metres. They also decided to test for rare metals and rare earth elements, and are pleased to report that rare metals and rare earth elements are also present and combined within a gold bearing quartz vein. This new info has just increased the potential of all other quartz veins intersected so far. Additional testing will be needed.

Initial Results reported on April 23rd, 2008:

Hole 25   Interval From   Interval To   Interval Metres   Au g/T
          1.5             4.5           3.0               5.77
Incl      1.5             2.5           1.0               14.55
          241.5           242.2         0.7               1.94
          291.0           293.0         2.0               19.61
Incl      292.0           293.0         1.0               43.73
And       292.5           293.0         0.5               79.31

New Results for Hole # 25 now include:

From 1.5 metres to 4.5 metres

3.0 metres of 5.77 g/t Au (Gold), 91.51 g/t Ce ( Cerium), 9.73 g/t Sc (Scandium), 25.31 g/t Rb (Rubidium), 53.10 g/t Nd (Neodymium), 34.01 g/t Li (Lithium), 60.60 g/t Sr (Strontium), 10.00 g/t Y (Yttrium), 66.02 g/t B (Boron), 26.81 g/t V (Vanadium), 13.81 g/t Yb (Ytterbium), 4.32 g/t Th (Thorium), 3.10 g/t Tb (Terbium), 1.41 g/t Ta (Tantalum), 14.5 g/t Sm (Samarium), 2.4 g/t Lu (Lutetium), 34.6 g/t La (Lanthanum), 14.5 g/t Hf (Hafnium), 3.0 g/t Eu (Europium), 230.0 g/t Cr (Chromium), 261.6 g/t Ba (Barium).

From 94.0 to 101.0 metres

7.0 metres of 107.7 g/t Ce (Cerium), 9.88 g/t Sc (Scandium), 62.0 g/t Rb (Rubidium), 61.7 g/t Nd (Neodymium), 44.10 g/t Li (Lithium), 40.50 g/t Sr (Strontium), 12.90 g/t Y (Yttrium), 56.70 g/t B (Boron), 11.90 g/t V (Vanadium), 13.0 g/t Yb (Ytterbium), 4.2 g/t Th (Thorium), 2.9 g/t Tb (Terbium), 1.3 g/t Ta (Tantalum), 14.2 g/t Sm (Samarium), 2.6 g/t Lu (Lutetium), 35.6 g/t La (Lanthanum), 13.4 g/t Hf (Hafnium), 3.5 g/t Eu (Europium), 94.70 g/t Cr (Chromium), 365.0 g/t Ba (Barium).

This Bobjo Mine project is located between the former South Bay Zinc / Copper Mine and the Uchi Lake Gold Mine. It is noted that an existing power line passes through the southern part of the property and that Bobjo is within trucking distance of the Placer Dome / Goldcorp Mill in Red Lake, Ontario. It is comprised of 259 claim units totaling 10,360 acres. The area has a history of gold and base metal production dating back 80 years and the work presently being carried out by the partners represents the commencement of the first modern, systematic exploration of the property since a two compartment shaft with two levels was sunk to 270 feet in 1929, approximately eighty years ago..

The partners are pleased with all the results so far, and especially with the new knowledge that rare metals and rare earth elements are also present and combined within a gold bearing quartz vein. A 15,000 meter drilling program is ongoing, and additional results will be released very shortly.

The joint venture is 50 % Mainstream Minerals (TSX.V: MJO) and 50 % Kings Bay Gold (TSX.V: KBG) with Mainstream Minerals being the Operator of the project. John Archibald, A.P.G.O. - Geologist is the Qualified Person under National Instrument 43-101. All of the samples herein were analyzed by SGS Canada Inc.'s and Accurassay's labs.

About Kings Bay Gold

King's Bay Gold is unique in the industry in that it owns most of the equipment required to carry out the various phases of exploration. This includes diamond drills, bulldozers and other exploration equipment, which gives the company the ability to quickly adjust work programs as exploration results are realized and company strategies change.

KBG Shares Outstanding: 38,654,350 Approximate Cash on hand: $2.1 million

King's Bay Gold Corporation Richard Rivet President & CEO (204) 253-4653info@kingsbaygold.comwww.kin...

The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release. Some of the statements contained in this release are forward-looking statements, such as estimates and statements that describe KBG's future plans, objectives or goals, including words to the effect that KBG or management expects a stated condition or result to occur. Since forward-looking statements address future events and conditions, by their very nature, they involve inherent risks and uncertainties.

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