Yellowhead Mining Inc.: Drill Hole HC11-87 Returned Best Intersection to Date at Harper Creek

Yellowhead Mining Inc. ("Yellowhead") (TSX VENTURE:YMI) is pleased to report
Hole HC11-87 returned 242.52 m of 0.39 Cu, 1.6 g/t Ag and 0.037 g/t Au,
including 33.45 m of 0.65% Cu, 2.1 g/t Ag and 0.071 g/t Au and 17.62 m of 0.96%
Cu, 4.5 g/t Ag and 0.069 g/t Au.


The results from the other final drill holes of the winter drill program,
HC11-85 and HC11-86 are also reported. Hole HC11-85 is in line along strike with
Holes HC10-82, HC11-83 and HC11-84 previously reported, as the most northerly
drill holes completed at the Harper Creek deposit to date. HC11-86 is the most
easterly drill hole on the Harper Creek deposit to date. The new drilling
results are presented on two sections.


Section 305620E

Holes HC11-85 and HC11-87 are part of a five-hole fence (including historical
hole J-45 as well as Yellowhead's holes HC10-79 and HC10-80) at the
north-eastern limit of the resource on Section 305300E. Hole HC11-85 is collared
200m east of hole HC10-82 and 489 m north of HC10-80. Hole HC11-87 is collared
118 m south of HC10-79.


The significant intersections from Hole HC11-85 and HC11-87 are presented in the
tables below.


HC11-85



----------------------------------------------------------------------
              Significant intersections - 0.2% Cu Cut-off             
----------------------------------------------------------------------
Hole                Interval (m)                     Results           
          ------------------------------ -----------------------------
                From        To    Length     Cu (%)  Ag (g/t)  Au (g/t)
----------------------------------------------------------------------
HC11-85       289.41    301.95     12.54      0.22       1.0     0.008
----------------------------------------------------------------------
              341.26    407.09     65.83      0.34       1.1     0.048
----------------------------------------------------------------------
              470.84    486.77     15.93      0.39       2.5     0.006
----------------------------------------------------------------------
 incl         471.82    473.81      1.99      1.09       5.9     0.010
----------------------------------------------------------------------



HC11-87



----------------------------------------------------------------------
              Significant intersections - 0.2% Cu Cut-off             
----------------------------------------------------------------------
Hole                Interval (m)                     Results           
          ------------------------------ -----------------------------
                From        To    Length     Cu (%)  Ag (g/t)  Au (g/t)
----------------------------------------------------------------------
HC11-87       220.30    462.82    242.52      0.39       1.6     0.037
----------------------------------------------------------------------
 incl         315.80    349.25     33.45      0.65       2.1     0.071
----------------------------------------------------------------------
 and          385.20    402.82     17.62      0.96       4.5     0.069
----------------------------------------------------------------------



Please refer to the Cross Section Map
http://www.yellowheadmining.com/i/pdf/2011-05-27-CrossSection305620-85-87.pdf 


and Drill Plan Map
http://www.yellowheadmining.com/i/pdf/2011-05-27-Drill-Plan-Map.pdf


or available at www.yellowheadmining.com.

Section 305860E

Hole HC11-86 is collared 241 m east of HC10-79.

HC11-86



----------------------------------------------------------------------
 Significant intersections - greater than or equal to 0.2% Cu Cut-off      
----------------------------------------------------------------------
Hole                Interval (m)                     Results           
          ------------------------------ -----------------------------
                From        To    Length     Cu (%)  Ag (g/t)  Au (g/t)
----------------------------------------------------------------------
HC11-86       297.47    343.91     46.44      0.28       1.4     0.025
----------------------------------------------------------------------
 incl          304.25    305.26      1.01      2.35       8.2     0.080
----------------------------------------------------------------------



Please refer to the Cross Section Map:
http://www.yellowheadmining.com/i/pdf/2011-05-27-CrossSection305860-86.pdf


Ian Smith, Chief Executive Officer, stated, "Hole HC11-87 is the best hole
drilled on the property to date considering width and grade, with 242.52 m
grading 0.39% Cu. This width of mineralization lies entirely below the pit limit
established in the Preliminary Economic Assessment (PEA), and shows the
potential to increase resources at depth within the pit outline. Holes HC11-85
and HC11-86 also demonstrate the potential to expand the resource to the north
down dip and to the east along strike from the pit limit established in the
PEA."


The program is being managed by CME Consultants Inc. ("CME").

Qualified Person

Christopher O. Naas, P.Geo. B.Sc., Project Manager for Yellowhead's Harper Creek
Project, is a qualified person as defined by National Instrument 43-101 and
prepared or reviewed the preparation of the scientific and technical information
in this press release with respect to the assay results from the Harper Creek
drill program. 


Sample Collection, Analyses, and QA-QC

All core processing was undertaken by CME personnel. Core was cut by electric
motorized rock saw with half core shipped to Eco Tech Laboratory Limited, part
of the Stewart Group (Eco Tech), in Kamloops, BC for sample preparation and
analysis. Drill core samples were analyzed for gold by fire assay with an AA
finish and multi-elements by total digestion ICP-ES. Core samples returning
greater than 2,000 ppm copper in the ICP-ES process were then assayed for
copper. In addition to control samples inserted by CME, the analytical
laboratory routinely inserted their own control samples, which consisted of
standards, blanks and sample repeats.


Harper Creek Project

Harper Creek is a copper-gold-silver volcanogenic sulphide deposit with a
measured and indicated resource of 563.2 million tonnes grading 0.31% Cu (3.6
billion pounds of copper) plus .032g/t gold and 1.08 g/t silver, plus an
inferred resource of 117 million tonnes grading 0.29% Cu (0.7 billion pounds of
copper). Mineralization occurs as a series of tabular bodies hosted within the
Eagle Bay Assemblage metavolcanic and metasedimentary rocks.


About Yellowhead Mining Inc.

Yellowhead has a 100% interest in the Harper Creek Project, (subject to the
payment of a 3% NSR royalty capped at $2.5 million, adjusted for inflation) and
an additional 2.5% NSR royalty on an estimated 3.3 million tonnes of ore which
is expected to be mined beginning in year nine within the NI 43-101 resource.
The Harper Creek Project is a large copper-gold-silver project located in
south-central British Columbia, approximately 150 kilometers by highway from
Kamloops. A Preliminary Economic Assessment Report, which demonstrated the
technical and economical viability of Harper Creek, was completed at the end of
March and filed on SEDAR on 1 April, 2011 and can be viewed on www.sedar.com.


FORWARD-LOOKING STATEMENTS AND CAUTIONARY DISCLAIMER

Except for statements of historical fact, this news release contains certain
"forward-looking information" within the meaning of applicable securities laws.
Forward-looking information is frequently characterized by words such as "plan",
"expect", "project", "intend", "believe", "anticipate", "estimate" and other
similar words, or statements that certain events or conditions "may" or "will"
occur. Forward-looking statements are based on the opinions and estimates of
management at the date the statements are made, and are subject to a variety of
risks and uncertainties and other factors that could cause actual events or
results to differ materially from those anticipated in the forward-looking
statements, including, among others, the accuracy of mineral grades and related
assumptions, inherent operating risks, planned expenditures, proposed
exploration and development at the Harper Creek Project, operating and economic
aspects of the Harper Creek Project, as well as those risk factors identified in
the Company's Annual Information Form filed under the Company's SEDAR profile.
Yellowhead undertakes no obligation to update forward-looking information if
circumstances or management's estimates or opinions should change except as
required by law. The reader is cautioned not to place undue reliance on
forward-looking statements. More detailed information about potential factors
that could affect financial results is included in the documents filed from time
to time with the Canadian securities regulatory authorities by Yellowhead.


This news release includes disclosure of scientific and technical information,
as well as information in relation to the calculation of resources, with respect
to the Harper Creek Project. Yellowhead's disclosure of mineral resource
information is governed by National Instrument 43-101 - Standards of Disclosure
for Mineral Projects ("NI 43-101") under the guidelines set out in the Canadian
Institute of Mining, Metallurgy and Petroleum (the "CIM") Standards on Mineral
Resources and Mineral Reserves, adopted by the CIM Council, as may be amended
from time to time by the CIM ("CIM Standards"). There can be no assurance that
mineral resources will ultimately be converted into mineral reserves. Mineral
resources are not mineral reserves and do not have demonstrated economic
viability. This news release uses the terms "measured", "indicated" and
"inferred" resources. U.S. persons are advised that while such terms are
recognized and required by Canadian regulations, the U.S. Securities and
Exchange Commission does not recognize them. "Inferred Resources" have a great
amount of uncertainty as to their existence and as to their economic and legal
feasibility. It cannot be assumed that all or any part of an inferred resources
will ever be upgraded to a higher category. Under Canadian rules, estimates of
inferred resources may not form the basis of feasibility or other economic
studies. U.S. persons are cautioned not to assume that all or any part of
measured or indicated resources will ever be converted into reserves. U.S.
persons are also cautioned not to assume that all or any part of an inferred
mineral resource exists, or is economically or legally mineable.
Celtic Minerals Ltd (Tier2) (TSXV:CME)
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