Pinnacle Discovers More High-Grade Polymetallic Mineralization at El Potrero with Silver Assays up to 1,159 grams per tonne Underscoring District Scale Potential
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Pinnacle Discovers More High-Grade Polymetallic Mineralization at El
Potrero with Silver Assays up to 1,159 grams per tonne Underscoring
District Scale Potential
VANCOUVER, BRITISH COLUMBIA, April 20 , 2026 (TSXV: PINN, OTC: PSGCF, Frankfurt: P9J) –
Pinnacle Silver and Gold Corp. ("Pinnacle" or the “ Company") is pleased to announce that
continued ground follow up on shafts, adits and prospecting pits interpreted from the recent airborne
LiDAR survey on the Potrero project in Durango, Mexico has resulted in further discoveries of
polymetallic mineralization . Prospecting on the northern El Potrero claim block has resulted in the
discovery of silver -rich veins, with assays up to 1,159 g/t Ag, while o n the Maria Fernanda 2 ( “MF2”)
concession, continued field work has extended the previously announced silver-lead-zinc (Ag-Pb-Zn)
mineralization along strike (see Pinnacle news release from March 17, 2026).
HIGHLIGHTS
• Ground follow up of the recent airborne LiDAR survey on the Potrero Project has resulted in the
discovery of new zones of polymetallic mineralization, enhancing the district scale potential of
the project
• On the northern El Potrero claim group, a new series of adits on northeast -trending vein
structures, dubbed the “Minas Nuevas” , returned assays up to 0.252 g/t Au, 1,159 g/t Ag,
4.72% Pb and 0.10% Zn over 0.35m
• On the MF2 block, the ”Paulina Breccia” zone has been traced for approximately 400 metres to
the northeast with 0.217 g/t Au, 47 g/t Ag, 0.65% Pb and 0.71% Zn over 0.40 m and 0.232 g/t
Au, 50 g/t Ag, 0.48% Pb and 0.77% Zn over 0.60 m.
• Also on the MF2 block and approximately 650 metres along strike to the southwest from the
Paulina Breccia, an artisanal mine called “Las Guasimas” has yielded assays up to 3.21 g/t Au,
349 g/t Ag, 3.49% Pb and 5.30% Zn from dump grabs
• Collectively, the Paulina Breccia and Guasimas mine extend the apparent strike length of the
vein system on MF2 to approximately 1,100 metres
“These exciting discoveries of high- grade gold- silver-lead-zinc mineralization not only validate the
effectiveness of the LiDAR survey, but are demonstrating the district scale potential of the mineralizing
system at El Potrero ,” stated Robert Archer, Pinnacle’s President & CEO. “ From the processing plant
at the northeast point of the project to the new Guasimas zone in the southwest is approximately 10
kilometres, and we now have both Au- Ag and Au- Ag-Pb-Zn mineralizing systems present. All of the
recently discovered NE -SW trending polymetallic mineralization is in sharp contrast to the purely gold
and silver NW -SE trending mineralization on the northern Dos de Mayo vein system and probably
represents a completely different age of hydrothermal activity. As all four of the operating mines
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surrounding the project are polymetallic , and the Au -Ag-Pb-Zn veins at the Topia Mine are just 4
kilometres away from MF2 , finding this style of mineralization across the Potrero property just
underscores how prolific this area really is.”
As announced on January 6, 2026, the LiDAR survey was flown over the entire 1,074 hectare property
and confirmed known structural trends, outlined previously unknown structures, and identified a total of
6 shafts, 64 adits and 51 prospecting pits on the two claim blocks comprising the project (Figure 1).
On the first pass of follow up work on the southern MF2 concession , several outcrops with silver -lead-
zinc sulphides in silicified breccia veins returned individual assays up to 266 g/t silver, 4.39% lead
and 2.89% zinc from channel samples up to 0.9 metres in length (see Pinnacle news release from
March 17, 2026).
Figure 1: El Potrero Project Showing Two Claim Blocks and Artisanal Workings Interpreted from LiDAR Survey
Continued follow up field work has now revealed a larger system with multiple polymetallic veins on
both claim blocks. On the northern El Potrero block, where the historic gold- silver mines and plant are
located, a series of adits have been discovered on structures trending 030-040° and dipping 75-80° SE.
Located in the south -central part of the block, approximately 3.5 kilometres south-southwest of the
plant, these artisanal mine workings, named “Minas Nuevas”, host several structures with disseminated
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to semi-massive pyrite, galena, sphalerite, arsenopyrite and quartz veinlets. The high sulphide content,
comparative lack of quartz and elevation of 1, 350 metres above sea level ( “masl”) compared to 2,200
masl at MF2, suggest that they may represent a lower level of the hydrothermal system. Preliminary
sampling also indicates that the veins here are Ag- Pb dominant, with assays up to 1,159 g/t Ag and
4.72% over 0.35 metres.
Table 1: Highlights of channel sampling on Minas Nuevas polymetallic veins at El Potrero
Sample No. Width (m) Au g/t Ag g/t Pb % Zn %
EPPR26094 0.30 0.038 240 4.74 0.17
EPPR26096 0.35 0.252 1,159 4.72 0.10
EPPR26098 0.25 0.064 334 0.33 0.20
EPPR26103 0.30 0.153 613 0.12 0.14
Figure 2: Potrero Block Showing LiDAR with Artisanal Workings and New Ag-Pb-Zn Discovery at Minas Nuevas
On the MF2 concession to the southwest, the “Paulina Breccia” zone with pyrite-sphalerite-galena
mineralization has been extended approximately 400 metres along strike to the northeast from the
initial discovery. Highlighted by 0.217 g/t Au, 47 g/t Ag, 0.65% Pb and 0.71% Zn over 0.40 m and
0.232 g/t Au, 50 g/t Ag, 0.48% Pb and 0.77% Zn over 0.60 m in the first-pass sampling, this tenor of
mineralization was fairly consistent along strike.
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Also on the MF2 block, an artisanal mine, called “Las Guasimas”, has yielded assays up to 3.21 g/t
Au, 349 g/t Ag, 3.49% Pb and 5.30% Zn in grab samples from mine dumps and 0.02 g/t Au, 117 g/t
Ag, 0.55% Pb and 0.15% Zn from a 0.60 m channel sample at the opening to the mine. Some cleaning
and rehabilitation of the old workings will be necessary before a proper underground sampling program
can be undertaken.
Figure 3: MF2 Block Showing LiDAR with Artisanal Workings, New Ag-Pb-Zn Discoveries & Alteration
As Las Guasimas and the Paulina Breccia zone appear to be along strike from each other, this
potentially extends the length of the vein system for approximately 1,100 metres. Furthermore,
preliminary mapping and prospecting indicate that other parallel veins exist , and this system is 6.5
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kilometres from the Minas Nuevas zone on the Potrero block, indicating a truly district scale
mineralizing system.
Table 2: Highlights of channel sampling on Paulina Breccia and Las Guasimas veins, MF2 block
Sample No. Zone Width (m) Au g/t Ag g/t Pb % Zn %
EPPR26050 Paulina Bx 0.40 0.217 47 0.65 0.71
EPPR26052 Paulina Bx 0.60 0.232 50 0.48 0.77
EPPR26105 Guasimas Grab 0.047 226 2.05 4.66
EPPR26106 Guasimas Grab 3.210 349 3.49 5.30
EPPR26107 Guasimas 0.60 0.019 117 0.55 0.15
EPPR26108 Guasimas 0.50 0.138 58 0.50 0.13
The newly discovered polymetallic veins have a northeasterly trend as opposed to the dominantly
northwesterly trend of the gold- silver veins in the northern part of the Potrero property. Follow -up
mapping, sampling and prospecting is continuing on both the MF2 and El Potrero blocks and additional
samples continue to be submitted to SGS Labs in Durango for assaying.
Eight channel samples were taken at Minas Nuevas, two at Las Guasimas (plus the two ‘dump grabs’)
and 33 on the Paulina Breccia, sampling both vein and wall rock material. Wall rock is unmineralized.
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 of f 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 I nstrument 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
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.
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Signed: “Robert A. Archer”
President & CEO
FOR FURTHER INFORMATION CONTACT:
Email: [email protected]
Tel.: +1 (877) 271-5886 ext. 110
Website: www.pinnaclesilverandgold.com
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Except for historical information contained herein, this news release contains forward- looking statements
including, but not limited to, comments regarding predictions and projections. Forward-looking statements
address future events and conditions and therefore involve inherent risks and uncertainties. Although Pinnacle
Silver and Gold believes that such expectations are reasonable, there can be no assurance that such
expectations will prove to be correct, and therefore actual results may differ materially from those currently
anticipated in such statements. Readers are cautioned not to place undue reliance on any such forward- looking
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