Announcement • Sep 02

Sonoro Gold Corp Announces Initial 10,000 Meters Drilling Results From Ongoing Campaign At Cerro Caliche

Sonoro Gold Corp. has announced assay results from the initial 10,000 meters completed as part of an ongoing 50,000-meter drilling campaign at the Company’s flagship Cerro Caliche gold project in Sonora, Mexico. The objective of the program is to potentially increase the size, grade and classification of the project’s mineral resource as well as confirm structural continuity of the northwest-trending mineralized corridors. A total of 46 reverse circulation drill holes were completed at the central-western region of the property where the Company proposes to develop an open-pit, heap leach mining operation as outlined in the technical report titled “Updated Mineral Resource Estimate and Preliminary Economic Assessment on the Cerro Caliche Gold Project,” dated December 4, 2025. Infill drilling confirms geological continuity and expansion of known mineralized zones while step-out drilling confirms both lateral and depth extensions of the mineralized corridors. Infill drilling at the already significant mineralized vein zone of Buena Suerte also confirmed mineralization in areas previously designated as waste. Targeted drilling at El Quince, the intermediate area between the central and western mineralized corridors, identified the area as a new and potentially significant mineralized zone with several higher-grade intervals. Target drilling at El Quince returned multiple intercepts of high-grade mineralization confirming this previously undrilled area as a potentially significant zone within the Cerro Caliche mineralized system. Extensive geological mapping, surface rock sampling and review of historical mine workings identified similar geological, structural and mineralized characteristics to those already identified at Cerro Caliche. With the construction of access roads by the Company, previously defined geological targets were drilled and assayed, confirming mineralization at El Quince to be associated with the project’s northwest-trending structures and corridors. Drill holes SCR-348 and SCR-349 both intersected higher grades of gold with high silver content, implying the zone was possibly downfaulted from a higher elevation. SCR-348 returned 9.14m @ 3.076 g/t Au and 26.10 g/t Ag, including 6.09m @ 4.531 g/t Au and 37.5 g/t Ag and SCR-349 returned 18.29m @ 1.674 g/t Au and 30.40 g/t Ag, including 6.10m @ 4.568 g/t Au and 84.60 g/t Ag. A total of 15 drill holes were completed at El Quince with intercepts confirming significant mineralization that may increase both the size and grade of the project’s overall resource. Drill holes SCR-333, SCR-334 and SCR-338 appear to have all intersected the Cabeza Blanca vein at depth as assay results demonstrated similar widespread lower grade gold mineralization. SCR-333 intercepted 6.10m @ 0.892 g/t Au, SCR-334 intercepted 6.09m @ 0.578 g/t Au and SCR-338 intercepted 10.66m @ 0.488 g/t Au. Drill holes SCR-337 and SCR-354 intersected mineralized intervals of 9.15m @ 0.633 g/t Au and 24.38m @ 0.368 g/t Au in the footwall of the northeasterly trending post mineral fault at San Quintin, representing lateral extensions of the mineralization. Buena Suerte is a significant mineralized vein zone on the property and targeted drilling at El Quince confirms the newly identified mineralized zone continues northward and merges into Buena Suerte. Step-out drilling in the footwall of the northeasterly trending post-mineral fault noted above at San Quintin also confirmed lateral extensions of Buena Suerte with drill holes SCR-355, SCR-356 and SCR-357 intercepting 3.05m @ 1.163 g/t Au, 15.24m @ 0.648 g/t Au and 9.14m @ 0.521 g/t Au respectively. Detailed geological mapping and surface sampling of areas at Buena Suerte previously designated for waste rock storage facilities as outlined in the technical report demonstrated evidence of mineralization, including stockworks, parallel quartz veinlets and hydrothermal breccias. Nine targeted infill drill holes were completed within this area previously modelled as waste confirming mineralization and the expansion of the Buena Suerte defined mineralized zone. Notable returns including drill holes: SCR-328: 6.10m @ 0.546 g/t Au; including 3.05m @ 1.008 g/t Au, SCR-362: 9.15m @ 0.607 g/t Au; including 1.52m @2.35 g/t Au, SCR-363: 10.66m @ 0.935m g/t Au; including 4.57m @ 1.6 g/t Au and 7.62m @ 0.496 g/t Au including 1.52m @ 1.338 g/t Au. Targeted drilling within and surrounding the mineral resource at Cabeza Blanca, Guadalupe and El Colorado investigated the potential continuity between the zones. Results confirm continuous gold mineralization between the zones, expanding known mineralization and potentially connecting the proposed pit shells within the mine plan as outlined in the technical report. Several drill holes returned higher grade intercepts including SCR-340 which intercepted 18.29m @ 3.39 g/t Au including 9.14m @ 6.43 g/t Au and 10.67m @ 1.23 g/t Au including 1.52m @ 7.12 g/t Au as well as drill hole SCR-358 which intercepted 7.62m @ 0.63 g/t Au including 1.52m @ 2.11 g/t Au. Results also confirm mineralization extending laterally and at depth with several zones remaining open with the potential to expand the mineralized corridors. 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 ranging from –45° to –70° and were oriented to intersect the mineralized structures as close to perpendicular as practicable. With the exception of the Guadalupe and El Colorado zones, 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 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.

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