Castle Resources Signs LOI to Option the Historic Granduc Copper Mine in Stewart, B.C.

TORONTO, ONTARIO, Apr 06 (MARKET WIRE) --
Castle Resources Inc. (TSX VENTURE: CRI) ("Castle" or the "Company") is
pleased to announce that it has signed a binding letter of intent "LOI"
with Bell Copper Corporation ("Bell Copper") to acquire up to a 90%
interest in the past producing Granduc Copper Mine located near Stewart,
B.C.

The Granduc Mine produced 420 million pounds of copper, along with
significant silver and gold credits, from 1971 through 1984 when it was
closed due to low copper prices. Newmont and ASARCO spent more than $115
million developing the project beginning in 1965, including the
construction of a 15-foot diameter, 11-mile long tunnel which served as
transportation for miners and equipment, as well as for ore and waste
haulage. Granduc operations included underground mining, crushing, and
grinding, followed by processing at a rated 9,000 ton per day millsite at
the east portal of the tunnel. Concentrate was trucked 32 miles to the
year-round deep sea port facility at the head of the Portland Canal in
Stewart.

"The Granduc is a significant copper project with infrastructure in place
and the potential for near-term production," said Castle President & CEO
Stephen Shefsky. "In addition, while historic mining covered just 750
metres of strike, exploration by Bell Copper has demonstrated similar
high-grade copper mineralization over a strike length exceeding 4,000
metres which remains open in all directions. We believe Granduc has the
potential to host a vastly larger mineral deposit than previously
realized due its resemblance to the geologically-similar Windy Craggy
deposit, the world's largest Besshi-style massive sulphide deposit."

According to four historic independent reserve estimates prepared during
the development and operation of the mine there remains a significant
undeveloped copper resource at site (See p.25 of the May 20, 2005 NI
43-101 posted on Bell Copper's SEDAR site). The total in-situ mineral
inventory (non NI 43-101 compliant) calculated by Newmont in 1966 for the
Granduc deposit was 39,442,403 tonnes grading 1.73% copper (Schmidt, et
al 1983). Approximately 15 million tonnes of ore was processed from 1971
-1984. The Granduc property is comprised of 64 Crown Granted claims that
total 1090.97 hectares in area and 29 mineral claims totaling 12,485
hectares. During the life of the Granduc mine, mineral resource estimates
depended on closely spaced diamond drilling sections and sampling of
drifts and crosscuts.

1966 Newmont In-situ Reserve Calculation: Surface to Approx. 1600 Level

Zone Tons Tonnes Grade %
A 7,344,900 6,683,859 1.76
B1 6,668,400 6,068,244 1.94
B2 7,914,100 7,201,831 1.62
C 7,829,900 7,125,209 1.42
F 12,888,300 11,728,353 1.82
CH/CF 513,800 467,558 2.28
FH1/2 & FHW 183,900 167,349 1.82
-------------------------------------
-------------------------------------
43,343,300 39,442,403 1.73

From: Schmidt, W., Tyler, P. and Dereniwski, T., 1983, Economic
Potential at Granduc, as referenced in Technical Report, Granduc
Property, Paul J. McGuigan, P.Geo. May 20, 2005. A qualified person has
not done sufficient work to classify the historical estimate as current
mineral resources, the issuer is not treating the historical estimate as
current mineral resources and the historical estimate should not be
relied upon.

Castle and Bell Copper have entered into a binding LOI that will allow
Castle to earn up to a 90% interest in the Granduc Mine and surrounding
areas over a 6 year option period. Castle can earn an 80% undivided
interest in the Granduc Mine during this period and will have the option
to earn an additional 10% by providing the financing after feasibility to
Bell Copper in order to put the Granduc into production. Castle will earn
a 51% interest at the end of Year 3 should it spend a total of $7 million
in exploration and drilling expenses.

As part of the option earn-in agreement Castle will commit to spending a
total of $25 million over 6 years (incl. $2.5 million in Year 1) and
commit to spending a minimum of $2 million per year with the contingency
of a one time catch up year when Castle does not spend a minimum of $2
million in the previous year. At closing of this transaction Castle will
pay $2.5 million to Bell Copper (of which $500,000 will be spent in the
first year on the Granduc Mine to the credit of Bell Copper) and will pay
250,000 Castle shares per year during the 6-year life of the option
(total of 1,500,000 shares). The binding LOI is subject to a 60 day due
diligence period. The Granduc property is subject to a 2% Net Smelter
Royalty (NSR), payable to B2Gold Corp. The NSR can be purchased by Castle
for $500,000 for the first one percent (1%) and $1 million for the
remaining one percent (1%). A $20,000 non- refundable payment was paid to
Bell Copper upon the signing of the binding LOI. The transaction is
subject to regulatory approval.

Teuton Resources Corp. will retain a 1.5 % NSR on the Silver Leduc claims
and on Bell Copper's four claims to the north of the Silver Leduc claims
(No. 415486, No. 415487, No. 415488 and No. 415489). Bell Copper's
Granduc Crown claims are excluded. The NSR is subject to an annual
advance royalty payment of $50,000 comprising cash and shares. The cash
component of the advance royalty will be $25,000 and the share component
will be $25,000 payable in common shares to be calculated as the average
price of the shares of the company over the previous 10 trading days
prior to the annual Dec. 31 payment date.

Over the past 5 years, Bell Copper has spent $5 million on mine
exploration, drilling and development at the Granduc. Much of this work
extended the known strike of the original Granduc deposit from 750 metres
to over 4 kms, encompassing two potentially new zones of mineralization.
In-fill drillings must be completed in accordance with NI 43-101
standards to bring these zones into a resource calculation.

Castle's immediate strategy for the Granduc will be to focus on: 1)
Redefining through new drilling the historic resource of the past
producing Granduc Deposit to achieve a NI 43-101 resource calculation,
and 2) Further the exploration program initiated by Bell Copper,
targeting the new North Zone and South Zone discoveries through a
combination of airborne and ground geophysics and surface diamond
drilling.

Brad Leonard, P. Geo., Castle's Exploration Manager, is the Qualified
Person responsible for the scientific and technical work discussed as
defined under National Instrument 43-101 and has reviewed this press
release.

About Castle Resources

Castle Resources Inc. is a Toronto-based junior mineral exploration
company focusing on high-quality, advanced exploration projects.
Management's goal is to complete due diligence on the past producing
Granduc Copper Mine and begin new exploration activities; as well,
management is quickly advancing the Elmtree Project in New Brunswick
toward feasibility in 2010. For more information please visit the Castle
Resources' website at www.castleresources.com

Disclaimer

Certain statements contained in this news release may contain
forward-looking information within the meaning of Canadian securities
laws. Such forward-looking information is identified by words such as
"estimates", "intends", "expects", "believes", "may", "will" and include,
without limitation, statements regarding the company's plan of business
operations (including plans for progressing assets), estimates regarding
mineral resources, projections regarding mineralization and projected
expenditures. There can be no assurance that such statements will prove
to be accurate; actual results and future events could differ materially
from such statements. Factors that could cause actual results to differ
materially include, among others, metal prices, risks inherent in the
mining industry, financing risks, labour risks, uncertainty of mineral
resource estimates, equipment and supply risks, title disputes,
regulatory risks and environmental concerns. Most of these factors are
outside the control of the company. Investors are cautioned not to put
undue reliance on forward-looking information. Except as otherwise
required by applicable securities statutes or regulation, the company
expressly disclaims any intent or obligation to update publicly
forward-looking information, whether as a result of new information,
future events or otherwise.

To view the, "Map of newly optioned claims and crown grants by Castle
Resources," please visit the following link:
http://media3.marketwire.com/docs/crimap1.pdf.

To view the, "Location map of the Granduc Copper Mine in the Stewart
Mining Camp," please visit the following link:
http://media3.marketwire.com/docs/crimap2.pdf.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as
that term is defined in the policies of the TSX Venture Exchange) accepts
responsibility for the adequacy or accuracy of this release.

Contacts:
Castle Resources Inc.
Stephen Shefsky
President & CEO
416-366-4200
cancap@on.aibn.com

Castle Resources Inc.
Lenny Foreht
VP Corporate Development
416-364-2266
lforeht@linearcapital.com

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