Trevali Continues to Intersect Broad Mineralized Intervals at Magistral South Zone on Santander Silver-Lead-Zinc Mine,

VANCOUVER, BRITISH COLUMBIA, Jul 23 (MARKET WIRE) --
Trevali Resources Corp. ("Trevali" or the "Company") (CNQ: ZINC)(PINK
SHEETS: TREVF)(FRANKFURT: 4TI) is pleased to announce that diamond
drilling continues to intersect broad intervals of mineralization at the
Magistral South zone on its advanced Santander silver-lead-zinc project
located in the Cerro de Pasco region of west-central Peru.

A total of 90 diamond drill holes have been completed to date of which
the Company has received assay results from the first 58 holes (Table 1 -
summaries of all the holes and location maps are available on the
Company's website).

Site infrastructure at the formerly-producing operation includes a fully
refurbished 200-man camp and associated support facilities, an ore
processing / concentrator plant (including various crushers, mills and
cell houses) able to produce zinc, lead-silver and copper concentrates
that is currently undergoing a refurbishment program, and the Tingo
hydroelectric power-station, located some 17-km down-valley to the west.

The current drill program at Santander represents the first modern
exploration on the large, 4,455-hectare (44km2) property and is designed
to test the three Magistral zones to approximately 200-metres vertical
depth. The majority of the holes have intersected significant sulphide
mineralization, which remains open at depth in all three bodies (see
website for details). Property-scale structural reconstructions indicate
the Magistral zones have quite significant additional depth potential -
conservatively interpreted to range from 300-to-500-metres vertical
extent. Drilling remains in progress.

Magistral Norte, the most northerly of the Magistral bodies, lies only
1.5-km north of the Company's mineral processing plant.

Table 1: Summary assay results - Santander Project

--------------------------------------------------------------------------
Down-
Zone/ hole Ag
Borehole Inter- equiv-
(dip/ val alent Ag oz/t
azimuth) From - To (i) (ii) (g/t) Pb% Zn% Cu%
--------------------------------------------------------------------------
Magistral 153- 5m 4.4oz 0.6oz 1.55% 1.02% -
Norte 158m (137.7g/t) (19.7g/t)
SAN-047
(-60/N50E) 191.25- 1.4m 6oz 0.9oz 2.66% 1.19% -
192.65m (189.5g/t) (28.3g/t)
--------------------------------------------------------------------------
Magistral 151.2- 54.5m - 0.6oz 0.25% 4.79% -
Sur 205.7m (19.4g/t)
SAN-048
(-41/240) Inc 167.9- 32m - 0.9oz 0.39% 5.99% -
199.9m (28.3g/t)
--------------------------------------------------------------------------
Magistral 128.65- 2.8m - - 0.83% 0.65% -
Norte 131.45m
SAN-049
(-50/N60E)
--------------------------------------------------------------------------
Magistral 175- 56m - 0.3oz 0.17% 3.55% -
Sur 231m (11g/t)
SAN-050
(-47/240) Inc 197.4- 30.6m - 0.3oz 0.23% 6.09% -
228m (11.3g/t)
--------------------------------------------------------------------------
Magistral 141.2- 44.9m - 0.2oz 0.04% 4.31% -
Sur 186.1m (9g/t)
SAN-051
(-41/240) Inc 142.1- 29.05m - 0.4oz 0.06% 6.22% -
171.15m (11.7g/t)
--------------------------------------------------------------------------
Magistral 54.1- 5.4m - 2oz 0.51% 5.12% -
Sur 59.5m (64.3g/t)
SAN-052
(-41/240) 64.5- 34.6m - 6g/t 0.02% 5.19% -
99.1m

Inc 78.5- 12m - 4.7g/t 0.01% 9.04% -
90.5m
--------------------------------------------------------------------------
Magistral 287.45- 12.25m - 5g/t 0.14% 3.26% -
Sur 299.7m
SAN-053
(-47/240) 312.3- 1.25m 17.8oz 3.8oz 2.69% 7.92% -
313.55m (555.3g/t) (118.8g/t)
--------------------------------------------------------------------------
Magistral 99.25- 7.65m - 3.6g/t 0.09% 2.39% -
Sur 106.9m
SAN-054
(-50/N60E
--------------------------------------------------------------------------
Magistral 62.6- 6m - 5.5g/t 0.22% 2.54% -
Sur 68.6m
SAN-055
(-50/ N60E)
--------------------------------------------------------------------------
Magistral 64.4- 15.1m - 8.2g/t 0.05% 6.39% -
Sur 79.5m
SAN-056
(-50/N60E)
--------------------------------------------------------------------------
Magistral Failed to intercept significant mineralization: The Magistral
Sur Sur body in these section lines thins upwards, and the bore
SAN-057&058 holes are the intersections closest to surface in their
respective section line. Thick zones of mineralization were
intersected in their down dip extensions in holes SAN-048&
SAN-050 respectively.
--------------------------------------------------------------------------

(i) Exploration to date suggests mineralized zones or mantos are dipping
west at approximately 70 degrees; however, it is anticipated that future
mapping of an underground exploration adit will allow a more accurate
estimation of true thickness.
(ii) Silver equivalent calculated using following metal prices: Ag $15/oz,
Pb $0.9/lb, Zn $0.9/lb, Cu $3/lb and assumes 100% recoveries.

Project Background

The Santander silver-lead-zinc mine project is located approximately 215
km by road from Lima, in the western extent of Peru's prolific Cerro de
Pasco mineral district. The mine operated from 1958-1993 targeting a
single Carbonate Replacement Deposit-type pipe and manto structure.
Approximately 8 million tonnes grading +7% zinc, 1-4% lead and 60
grams/tonne silver plus by-product copper was processed - initially from
open pit operations and then from underground mining reaching a depth of
500 metres below surface in mineralization grading about 11% zinc.
Drilling by past operators indicates this mineralization remains open to
depth - extending at least 200 metres further beneath the previous
workings.

Recent exploration drilling by the Company has focused on three other
similarly mineralized manto to pipe-type structures (Magistral North,
Central and South) situated in favourable carbonate host rocks and
located a couple of kilometres northwest - along the same structural
trend hosting the Santander orebody.

Qualified Person and Quality Control/Quality Assurance

EurGeol Dr. Mark D. Cruise, Trevali's President and CEO and a qualified
person as defined by National Instrument 43-101, has supervised the
preparation of the scientific and technical information that forms the
basis for this news release. Dr. Cruise is not independent of the
Company, as he is an officer and shareholder.

The work programs at Trevali were designed by, and are supervised by,
Mark D. Cruise, President & CEO, Trevali, and Les Oldham, General
Manager, Consultora Minera Anglo Peruana S.A.(independent geological
consultants), who together are responsible for all aspects of the work,
including the quality control/quality assurance program. On-site
personnel at the project rigorously collect and track samples which are
then security sealed and shipped to ACME Laboratories, Vancouver, for
assay. ACMEs quality system complies with the requirements for the
International Standards ISO 9001:2000 and ISO 17025: 1999. Analytical
accuracy and precision are monitored by the analysis of reagent blanks,
reference material and replicate samples. Quality control is further
assured by the use of international and in-house standards. Blind
certified reference material is inserted at regular intervals into the
sample sequence by Trevali personnel in order to independently assess
analytical accuracy. Finally, representative blind duplicate samples are
routinely forwarded to ACME and an ISO compliant third party laboratory
for additional quality control.

About Trevali Resources Corp.

The Company is currently exploring and conducting various scoping level
studies on the former Santander polymetallic mine Peru in order to
ascertain as best as possible the cost and feasibility of re-commencing
mining and milling operations in a timely manner should exploration prove
to be successful.

The common shares of the Company are currently listed on the CNQ (symbol
ZINC). For further details on the Company readers are referred to the
Company's web site (www.trevaliresources.com) and to Canadian regulatory
filings on SEDAR at www.sedar.com.

On Behalf of the Board of Directors of TREVALI RESOURCES CORP.

Mark D. Cruise, President

The CNQ has not reviewed and does not
accept responsibility for the adequacy or accuracy of this release.

Contacts:
Trevali Resources Corp.
Steve Stakiw
Manager - Corporate Communications
(604) 488-1661
(604) 408-7499 (FAX)
Email: sstakiw@trevaliresources.com
Website: www.trevaliresources.com

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