Pinnacle Prepares for Underground Drill Program on High-Grade Gold- Silver Targets at El Potrero VANCOUVER, BRITISH COLUMBIA, Dec ember 15, 2025 (TSXV: PINN, OTC: PSGCF, Frankfurt: P9J) – Pinnacle Silver and Gold Corp. ("Pinnacle" or the “Company") is pleased to announce that its
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Pinnacle Prepares for Underground Drill Program on High-Grade Gold-
Silver Targets at El Potrero
VANCOUVER, BRITISH COLUMBIA, Dec ember 15, 2025 (TSXV: PINN, OTC: PSGCF, Frankfurt:
P9J) – Pinnacle Silver and Gold Corp. ("Pinnacle" or the “Company") is pleased to announce that its
geological team, led by Jorge Ortega, QP, has prepared an inaugural underground drilling program for
the high-grade El Potrero gold-silver project in Durango, Mexico (Figure 1 below) . Systematic
underground channel sampling has been conducted since acquiring the project at the end of February
and comprises 773 samples in the three historic mine workings along 500 metres of the Dos de Mayo
epithermal vein system (Figure 2 below) . This work has identified several shoots of high- grade gold-
silver mineralization in the three mines (see Pinnacle news releases of June 2, July 22, September 9
and November 12, 2025 ), with individual grades up to 85.1 g/t Au and 520 g/t Ag. Several hundred
surface channel samples above the historic mines grading up to 37.4 g/t Au and up to 2,280 g/t Ag (see
Pinnacle news release of June 2, 2025) imply continuity of the mineralization to surface.
As the underground sampling was limited to the extent of the mine workings, detailed drilling is
necessary to determine the ultimate size, shape and grade of the mineralized zones. Consequently,
Pinnacle’s geological team has compiled the results and created 3D model s of the Dos de Mayo vein
and the exposed mineralization in the 3 mines (see Figure 3 below) in order to create a program of
systematic drilling whereby the vein structure will be tested every 12.5 metres along strike and
vertically. As the holes will be collared either in or immediately adjacent to the vein structure, holes will
be relatively short, in the range of 20- 25 metres in length. At present, it is anticipated that the entire
program will comprise approximately 2,600 metres in 112 holes and take about 6 weeks to complete.
“The underground drilling will be a significant step in the development of the Potrero Project ,” stated
Robert Archer, Pinnacle’s President & CEO . “It is not common that the first drill program on a new
project is underground. However, w e are fortunate to have good access to at least some of the
mineralization through the historic mine workings and this detailed program will essentially be
delineation drilling rather than exploration. With the results of this program, we will gain a very good
understanding of the principal mineralized zones such that we can begin putting together a preliminary
mine plan. Follow-on surface drilling can then test the areas between the mine workings in addition to
less developed veins like El Capulin and La Estrella that are being sampled for the first time.”
A certain amount of development work will be required in the historic workings to create enough room
for the drill setups and make sure that the drillers will have a safe working environment. This work will
begin early in the New Year and will take about one month to complete , with drilling to follow as soon
as possible.
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Figure 1: Location Map of El Potrero gold-silver project in the Sierra madre of Durango State, surrounded by 4 operating
mines within 35 km
Figure 2: Plan map of north end of El Potrero gold-silver project showing main Dos de Mayo vein, with the Pinos Cuates, Dos
de Mayo and La Dura Mines where underground drilling will take place
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Figure 3: Screen shot of 3D model of Dos de Mayo vein (purple) in the Pinos Cuates Mine, showing high-grade gold and
silver samples (red, yellow and green) and proposed drill holes to test extension of mineralization
QA/QC
The technical results contained in this news release have been reported in accordance with National
Instrument 43- 101 Standards of Disclosure for Mineral Projects ("NI 43 -101"). Pinnacle has
implemented industry standard practices for sample preparation, security and analysis given the stage
of the Project. This has included common industry QA/QC procedures to monitor the quality of the
assay database, including inserting certified reference material samples and blank samples into
sample batches on a predetermined frequency basis.
Systematic chip channel sampling was completed across exposed mineralized structures using a
hammer and m aul. The protocol for sample lengths established that they were not longer than two
metres or shorter than 0.3 metres . The veins tend to be steeply dipping to vertical, and so these
samples are reasonably close to representing the true widths of the structures. Samples were
collected along the structural strike or oblique to the main structural trend. Grab samples, by their
nature, are only considered as indicative of local mineralization and should not be considered as
representative.
All samples were bagged in pre- numbered plastic bags; each bag had a numbered tag inside and
were tied off with adhesive tape and then bulk bagged in rice bags in batches not to exceed 40 kg.
They were then numbered, and batch bags were tied off with plastic ties and delivered directly to the
SGS laboratory facility in Durango, Mexico for preparation and analysis. The lab is accredited to
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ISO/IEC 17025:2017. All Samples were delivered in person by the contract geologist who conducted
the sampling under the supervision of the QP.
SGS sample preparation code G_PRP89 including weight determination, crushing, drying, splitting,
and pulverizing was used following industry best practices where all samples were crushed to 75%
less than 2 mm, riffle split off 250 g, pulverized split to > 85% passing 75 microns (μm). All samples
were analyzed for gold using code GA_FAA30V5 with a Fire Assay determination on 30g samples
with an Atomic Absorption Spectography finish. An ICP -OES analysis package (Inductively Coupled
Plasma - Optical Emission Spectrometry) including 33 elements and 4 -acid digestion was performed
(code GE_ICP40Q12) to determine Ag, Zn, Pb, Cu and other elements.
Qualified Person
Mr. Jorge Ortega, P. Geo, a Qualified Person as defined by National Instrument 43 -101, and the
author of the NI 43-101 Technical Report for the Potrero Project, has reviewed, verified and approved
for disclosure the technical information contained in this news release.
About the Potrero Property
El Potrero is located in the prolific Sierra Madre Occidental of western Mexico and lies within 35
kilometres of four operating mines, including the 4,000 tonnes per day (tpd) Ciénega Mine (Fresnillo),
the 1,000 tpd Tahuehueto Mine (Luca Mining) and the 250 tpd Topia Mine (Guanajuato Silver).
High-grade gold-silver mineralization occurs in a low sulphidation epithermal breccia vein system
hosted within andesites of the Lower Volcanic Series and has three historic mines along a 500 metre
strike length. T he property has been in private hands for almost 40 years and has never been
systematically explored by modern methods, leaving significant exploration potential.
A previously operational 100 tpd plant on site can be refurbished / rebuilt and historic underground
mine workings rehabilitated at relatively low cost in order to achieve near -term production once
permits are in place. The property is road accessible with a power line within three kilometres.
Pinnacle will earn an initial 50% interest immediately upon commencing production. The goal would
then be to generate sufficient cash flow with which to further develop the project and increase the
Company’s ownership to 100% subject to a 2% NSR. If successful, this approach would be less
dilutive for shareholders than relying on the equity markets to finance the growth of the Company.
About Pinnacle Silver and Gold Corp.
Pinnacle is focused on the development of precious metals projects in the Americas. The high- grade
Potrero gold- silver project in Mexico’s Sierra Madre Belt hosts an underexplored low -sulphidation
epithermal vein system and provides the potential for near -term production. In the prolific Red Lake
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District of northwestern Ontario, the Company owns a 100% interest in the past -producing, high-
grade Argosy Gold Mine and the adjacent North Birch Project with an eight -kilometre-long target
horizon. With a seasoned, highly successful management team and quality projects, Pinnacle Silver
and Gold is committed to building long-term, sustainable value for shareholders.
Signed: “Robert A. Archer”
President & CEO
FOR FURTHER INFORMATION CONTACT:
Email: [email protected]
Tel.: +1 (877) 271-5886 ext. 110
Website: www.pinnaclesilverandgold.com
Neither the TSX Venture Exchange nor the Investment Industry Regulatory Organization of Canada
accepts responsibility for the adequacy or accuracy of this release.