SONORO GOLD ANNOUNCES CONTINUED EXPANSION OF HIGHER-GRADE MINERALIZATION AT CERRO CALICHE

VANCOUVER, Canada, Oct. 01, 2026 (GLOBE NEWSWIRE) -- Sonoro Gold Corp. (TSXV: SGO | OTCQB: SMOFF | FRA: 23SP) (“Sonoro” or the “Company”) is pleased to announce assay results from an additional 26 drill holes completed at the Company’s flagship Cerro Caliche gold project in Sonora, Mexico. The Company has now completed 72 drill holes over 14,086.35 meters as part of an ongoing 50,000-meter campaign.

Results reflect over 4,100 meters of drilling completed at the recently acquired Diana concession as well as at the newly-identified mineralized zone at La Colorada demonstrating the project’s potential to host multiple gold mineralized zones across the property.

Highlights:

• SCR-378

• • 6.10m @ 2.261 g/t Au, including:
  • 3.05m @ 4.296 g/t Au

• SCR-386

• • 18.29m @ 1.239 g/t Au, including:
  • 3.05m @ 5.541 g/t Au

• SCR-387

• • 28.95m @ 2.598 g/t Au, including:
  • 13.72m @ 5.101 g/t Au

• SCR-391

• • 32.00m @ 1.846 g/t Au, including:
  • 4.57m @ 10.430 g/t Au

• SCR-396

• • 47.24m @ 1.552 g/t Au, including:
  • 6.10m @ 5.623 g/t Au

“The latest drilling results continue to demonstrate the significant potential for multiple gold mineralized zones at Cerro Caliche,” said Sonoro President & CEO Kenneth MacLeod. “Higher-grade intercepts, including higher-grade intervals within broader mineralized zones, from drilling completed at Diana validates our decision to expand the north extension of the project and supports our hypothesis that Cerro Caliche is likely part of a larger gold epithermal system, with district-scale potential. While we maintain our objective to develop an initial mining operation at Cerro Caliche, we also plan to continue investigating the recently acquired concessions where historical data indicates the potential for higher-grade gold mineralization.”

The map below illustrates the location of the drill holes.

Figure 1: Location Map of Drill Holes

Click here to view image

Diana Mineralized Area

A total of 14 reverse circulation (“RC”) drill holes were completed at the recently acquired Diana concession, located north of the project’s Rincón–Bellotoso mineralized zone. Multiple higher-grade intercepts confirmed the presence of shallow, higher-grade gold mineralization supporting the potential for Diana to be another significant mineralized zone. Assays from 10 of the 14 drill holes completed at Diana returned multiple intercepts over 1 gram of gold per tonne (“g/t Au”) over 1 meter (“m”).

Results from nine drill holes at Diana demonstrate gold mineralization extending southeast across the Bellotoso Plateau, which straddles the northern boundary of the project’s original property and the recently acquired northern concessions. Highlights include drill holes:

• SCR-386 intercepted 8.29m @ 1.239 g/t Au, including 3.05m @ 5.541 g/t Au

• SCR-387 intercepted 28.95m @ 2.598 g/t Au, including 13.72m @ 5.101 g/t Au

• SCR-391 intercepted 32m @ 1.846 g/t Au, including 4.57m @ 10.430 g/t Au

Other notable results were returned from drill holes:

• SCR-389 intercepted 15.24m @ 0.555 g/t Au, including 1.52m @ 3.520 g/t Au

• SCR-390 intercepted 44.19m @ 0.480 g/t Au, including 4.57m @ 1.210 g/t Au

• SCR-392 intercepted 30.48m @ 0.471 g/t Au, including 1.53m @ 3.284 g/t Au

Results from five drill holes completed to the west of Diana demonstrated gold mineralization which also extends northwest towards the historic workings of El Batamote mine.  Highlights include drill holes:

• SCR-396 intersected 47.24m @ 1.552 g/t Au, including 6.10m @ 5.623 g/t Au

• SCR-398 intercepted 56.39m @ 0.410 g/t Au including 3.05m @ 2.102 g/t Au

The map below illustrates the location of the drill holes completed at Diana.

Figure 2: Map of Drill Holes at Diana

Click here to view image

As previously disclosed, the Company acquired historical geological data from prior exploration completed at Diana and El Batamote, including rock and soil samples, drill logs and assay certificates. A detailed analysis of the historical data, together with extensive geological mapping and current drilling results, demonstrates the potential continuity of the project’s northwest-trending structural and rhyolite-hosted mineralized corridors into the recently acquired northern concessions.

Additional drilling is required to fully define the Diana mineralized zone as well as several mineralized structures identified across the northern extension.

La Colorada Mineralized Zone

A total of 12 RC drill holes were completed at La Colorada, a newly identified mineralized zone located in the central-western region of the property, approximately 300 meters to the west of where the Company proposes to develop an open-pit, heap leach mining operation as outlined in a Preliminary Economic Assessment (the “PEA”) filed April 24, 2026.

Drilling outlined a new northwest-trending mineralized zone characterized by rhyolitic dikes, structurally controlled breccias, multiple mineralized structures and numerous historical mine workings. The structural complexity of the area appears similar to nearby El Colorado zone, and drilling intercepted mineralized structures that are interpreted to be part of the same La Colorada structural system, including the previously identified Huevo de Oro splay.

Four drill holes at El Colorada returned intercepts over 1 g/t Au over 1 meter including SCR-378 which intercepted 6.10m @ 2.261 g/t Au, including 3.05m @ 4.296 g/t Au and SCR-384 which intercepted 4.57m @ 0.648 g/t Au, including 1.52m @ 1.404 g/t Au.

Drilling was also completed in the area between La Colorada and the footwall of the mineralized Guadalupe zone. This broad area is characterized by numerous small gold bearing quartz veins and prior surface mapping and sampling indicate additional mineralization potential.

Additional drilling is required to determine the continuity of mineralization as well as the interconnection of various mineralized structures.

The map below illustrates the location of the drill holes completed at La Colorada.

Figure 3: Map of Drill Holes at La Colorada

Click here to view image

Below are selected drill results containing interval grading of 1.0 g/t Au or greater.

Cerro Caliche Project, Holes Composites with Cut-off 0.13 g/t Au
Hole	Target		From	To		Interval	Au	Ag
			Meters				g/t	g/t
SCR-378	LA COLORADA		70.10	76.20	6.10		2.261	0.200
		includes	70.10	73.15	3.05		4.296	0.300
SCR-380	LA COLORADA		121.92	123.44	1.52		1.014	2.200
SCR-381	LA COLORADA		120.40	121.92	1.52		1.614	3.100
SCR-384	LA COLORADA		21.34	22.86	1.52		1.404	0.800
SCR-386	DIANA		15.24	33.53	18.29		1.239	0.700
		includes	24.38	27.43	3.05		5.541	0.900
SCR-387	DIANA		0.00	4.57	4.57		1.186	1.800
		includes	0.00	1.52	1.52		2.541	2.400
		and	25.91	54.86	28.95		2.598	1.400
		includes	35.05	48.77	13.72		5.101	2.300
SCR-389	DIANA		3.05	18.29	15.24		0.555	1.600
		includes	6.10	7.62	1.52		3.520	2.300
SCR-390	DIANA		6.10	50.29	44.19		0.480	2.000
		includes	7.62	9.14	1.52		1.869	15.300
		includes	36.58	42.67	4.57		1.210	1.400
SCR-391	DIANA		10.67	42.67	32.00		1.846	3.500
		includes	18.29	22.86	4.57		10.430	12.200
		includes	27.43	28.96	1.53		1.332	2.600
		includes	41.15	42.67	1.52		1.919	0.900
SCR-392	DIANA		0.00	30.48	30.48		0.471	0.800
		includes	1.52	3.05	1.53		3.284	2.200
SCR-393	DIANA		0.00	36.58	36.58		0.387	0.600
		includes	32.00	33.53	1.53		3.282	0.800
SCR-394	DIANA		7.62	39.62	32.00		0.380	0.600
		includes	15.24	16.76	1.52		1.877	0.150
SCR-396	DIANA		53.34	100.58	47.24		1.552	3.600
		includes	54.86	57.91	3.05		7.433	13.400
		includes	70.10	71.63	1.53		1.865	0.600
		includes	77.72	83.82	6.10		5.623	11.000
		includes	92.96	94.49	1.53		2.712	2.900
SCR-398	DIANA		0.00	56.39	56.39		0.410	0.500
		includes	19.81	22.86	3.05		2.102	0.900
		includes	36.58	38.10	1.52		1.144	1.200

The reported gold and silver grades are analytical results taken directly from assay certificates issued by Bureau Veritas and are reported uncut. The drill results presented herein are exploration results and do not constitute an updated mineral resource estimate. The results will be incorporated into the geological model and evaluated as part of a future mineral resource estimate update prepared in accordance with NI 43-101.

Mineralized intervals were composited using a nominal reporting cut-off grade of 0.13 g/t Au. This reporting criterion is used solely to present the continuity of the intercepted mineralization and does not represent a new mineral resource estimate or an assessment of economic viability.

True widths are estimated to represent approximately 60% to 90% of the reported drilled interval lengths. Drill holes were completed at inclinations of –45° and were oriented to intersect the mineralized structures as close to perpendicular as practicable. The mineralized structures generally have steep dips approaching vertical.

Drill collar locations, azimuths and dips for the drill holes included are provided in the table below.

Drill Collar Locations (NAD 1927 UTM Zone 12N)
Hole ID	Zone	East	North	Elevation	Depth	Az	Dip
SCR-374	La Colorada	535,567	3,365,167	1,321	121.92	255	-45
SCR-375	La Colorada	535,493	3,365,290	1,338	103.63	288	-45
SCR-376	La Colorada	535,503	3,365,284	1,338	109.73	235	-45
SCR-377	La Colorada	535,605	3,365,308	1,351	207.26	125	-45
SCR-378	La Colorada	535,511	3,365,423	1,260	134.11	265	-45
SCR-379	La Colorada	535,602	3,365,438	1,269	158.50	275	-45
SCR-380	La Colorada	535,605	3,365,311	1,351	249.94	285	-45
SCR-381	La Colorada	535,446	3,365,353	1,305	164.59	285	-45
SCR-382	La Colorada	535,417	3,365,498	1,253	164.59	160	-45
SCR-383	La Colorada	535,536	3,365,241	1,365	201.17	305	-45
SCR-384	La Colorada	535,631	3,364,936	1,223	152.40	255	-45
SCR-385	La Colorada	535,730	3,364,970	1,245	121.92	235	-45
SCR-386	Diana	537,135	3,367,930	1,480	76.20	50	-45
SCR-387	Diana	537,166	3,367,909	1,488	82.30	50	-45
SCR-388	Diana	537,176	3,367,996	1,496	79.25	50	-45
SCR-389	Diana	537,205	3,367,996	1,498	10.67	50	-45
SCR-389a	Diana	537,200	3,367,992	1,498	88.39	50	-45
SCR-390	Diana	537,176	3,367,994	1,496	79.25	230	-45
SCR-391	Diana	537,259	3,367,971	1,491	85.34	230	-45
SCR-392	Diana	537,186	3,367,935	1,490	76.20	50	-45
SCR-393	Diana	537,232	3,367,859	1,466	249.94	50	-45
SCR-394	Diana	536,697	3,368,037	1,415	176.78	230	-45
SCR-395	Diana	536,979	3,367,958	1,445	249.94	230	-45
SCR-396	Diana	536,792	3,368,169	1,434	365.76	230	-45
SCR-397	Diana	536,632	3,368,024	1,411	368.81	230	-45
SCR-398	Diana	536,770	3,367,969	1,435	262.13	230	-45

Quality Assurance/Quality Control (QA/QC) Measures and Analytical Procedures

Drill samples are collected through an airstream cyclone and passed through a sample splitter three consecutive times to improve sample homogeneity. A representative split comprising approximately 40% of each sample is then placed in a bag, identified, sealed, and sent to the laboratory. As part of the quality assurance and quality control (QA/QC) program, blanks, certified reference materials (standards), and duplicate samples are systematically inserted into the sample stream.

Personnel from either Sonoro Gold Corp. or Bureau Veritas (BV) collect the samples directly from the drill site and transport them to BV’s sample preparation laboratory in Hermosillo, Sonora. At the laboratory, the entire sample received is crushed, and an approximate 250-gram split is obtained and pulverized.

Approximately 90 grams of each pulverized sample are separated and sent to BV’s laboratories in Hermosillo, Sonora, or Reno, Nevada. A 30-gram aliquot of this material is analyzed for gold using fire assay with an atomic absorption finish. Additionally, an approximate 10-gram aliquot of each pulverized sample is sent to BV’s laboratory in Vancouver, Canada, where it undergoes aqua regia digestion followed by multi-element ICP analysis, including silver.

A review of the inserted control-sample results identified no significant QA/QC issues with the analytical results received from the laboratories involved.

Qualified Person Statement
Stephen Kenwood, P.Geo., an Independent Director of Sonoro, is a Qualified Person within the context of National Instrument 43-101 (NI 43-101) and has read and approved this news release.

About Sonoro Gold Corp.
Sonoro Gold Corp. is a publicly listed exploration and development Company holding the near-development-stage Cerro Caliche project and the exploration-stage San Marcial project in Sonora State, Mexico. The Company has highly experienced operational and management teams with proven track records for the discovery and development of natural resource deposits.

To keep up-to-date on Sonoro’s developments, please join our online communities on X, Facebook, LinkedIn, Instagram, and YouTube and visit Sonoro’s website and subscribe to receive the latest news and updates delivered straight to your inbox.

On behalf of the Board of Sonoro Gold Corp.
Per:  Kenneth MacLeod”
          Kenneth MacLeod
          President & CEO

For further information, please contact: 
Sonoro Gold Corp. - Tel: (604) 632-1764
Email: info@sonorogold.com

Forward-Looking Statement Cautions:
This press release may contain "forward-looking information" as defined in applicable Canadian securities legislation. All statements other than statements of historical fact, included in this release, including, without limitation, statements regarding the Cerro Caliche project, and future plans and objectives of the Company, constitute forward looking information that involve various risks and uncertainties, including statements regarding completion of an updated preliminary economic assessment of the Cerro Caliche Gold project.. Although the Company believes that such statements are reasonable based on current circumstances, it can give no assurance that such expectations will prove to be correct. Forward-looking statements are statements that are not historical facts; they are generally, but not always, identified by the words "expects", "plans", "anticipates", "believes", "intends", "estimates", "projects", "aims", "potential", "goal", "objective", "prospective" and similar expressions, or that events or conditions "will", "would", "may", "can”, "could" or "should" occur, or are those statements, which, by their nature, refer to future events.  The Company cautions that forward-looking statements are based on the beliefs, estimates and opinions of the Company's management on the date the statements are made and they involve a number of risks and uncertainties, including the possibility of unfavorable exploration and test results, the lack of sufficient future financing to carry out exploration and development plans and unanticipated changes in the legal, regulatory and permitting requirements for the Company’s exploration programs.  There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law or the policies of the TSX Venture Exchange. Readers are encouraged to review the Company’s complete public disclosure record on SEDAR at www.sedar.com.

This press release does not constitute or form a part of any offer or solicitation to purchase or subscribe for securities in the United States. The securities referred to herein have not been and will not be registered under the Securities Act of 1933, as amended (the “Securities Act”), or with any securities regulatory authority of any state or other jurisdiction in the United States, and may not be offered or sold, directly or indirectly, within the United States or to, or for the account or benefit of, U.S. persons, as such term is defined in Regulation S under the Securities Act (“Regulation S”), except pursuant to an exemption from or in a transaction not subject to the registration requirements of the Securities Act”

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