| Dolly Varden Silver Intersects 1,422 g/t Silver over 21.70 Meters, Including 10,700 g/t Silver over 1.00 Meter at Wolf Vein 
 newsfilecorp.com
 
 September 02, 2025 8:00 AM EDT | Source:  Dolly Varden Silver Corporation
 
 Vancouver, British Columbia--(Newsfile Corp. - September 2, 2025) -  Dolly Varden Silver Corporation (TSXV: DV) (NYSE American: DVS) (FSE:  DVQ) (the "Company" or "Dolly Varden") is pleased to  announce results from directional drilling at the Wolf Vein.  High grade  silver mineralization was intersected within a gap in drilling  intersecting 1,422 g/t Ag over 21.70 meters in DV25-446, located 105 meters up-dip from the furthest down plunge step-out, hole DV24-421(released January 7, 2025). The  intersection includes gold and strong base metal grades, which are  increasing at depth and closer to the projected central valley  structure. A portion of the ongoing 55,000 meter planned drill program  at the Company's 100% owned Kitsault Valley Silver and Gold Project is  being drilled at the Wolf Vein to expand and infill the plunge of  high-grade silver mineralization. The deposit remains open to depth.
 
 Wolf Vein Drill Hole
 
 DV25-446:  1,422 g/t Ag, 0.51 g/t Au, 3.05% Pb and 1.42% Zn over 21.70 meters, including
 
 10,700 g/t Ag, 2.54 g/t Au, 4.33% Pb and 1.68% Zn over 1.00 meter
 
 *  Intervals shown are core length. Estimated true widths vary depending  on intersection angles and range from 55% to 65% of core lengths,  further modelling of the new intersections is needed before true widths  can be estimated.
 
 "These high-grade silver results over  wide intervals suggest excellent continuity at the Wolf Vein. The  mineralization in drill hole DV25-446 includes abundant native silver  and is consistent with the robust style of mineralization with a  significant increase in associated gold and base metal values.    Additional drilling at Wolf is being prioritized for the remainder of  the season," said Shawn Khunkhun, CEO of Dolly Varden Silver.
 
 Five  diamond drills are working on the Kitsault Valley and Big Bulk  Projects. Focus has been on step out and infill drilling of the Wolf  Vein and Homestake Silver deposits, as well as exploration drilling of  the copper-gold porphyry system at Big Bulk and several other targets in  the Kitsault Valley. More results will be released as they are received  and incorporated into the company's models.
 
 The Company is using  directional drilling technology to precisely target areas for step-out  and infill work at both Wolf and Homestake Silver. Drillhole DV25-446 is  a deflection hole (daughter hole) off the initial "mother" hole drilled  from the north at surface from which four additional holes were  directed off at depths near the base of the sedimentary cap. The vein  intercept in DV25-446 is approximately 105 meters up plunge (in-fill)  from the 2024 step out DV24-421.
 
 
  
 Figure 1.   Plan of Wolf Vein modelled mineralized zone (in red) highlighting all  2025 drilling completed to date with lithology shown on drill trace.
 
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 Figure 2.   Longitudinal Section of Wolf Vein with mineralization envelope in red.  Plunge of high-grade silver mineralization infill by drill hole  DV25-446.
 
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 Wolf Vein
 
 The  Wolf Vein is hosted in Jurassic-age Hazelton Formation volcanic rocks  and is interpreted as a structurally controlled, multi phased,  epithermal vein and vein breccias that occur along a southwest plunging  zone of wider, higher grade silver mineralization. Native silver,  pyrargyrite, argentite and argentiferous galena are hosted in multiple  phases of silica and iron carbonate veins and breccias. The extention of  the mineralization discovered underneath the sedimentary rock cap and  the initial Wolf deposit that comes to surface has a plunge extent of  ver 950 meters at -45 to the southwest.
 
 
  
 Figure 3.     Core from Wolf Vein: silver mineralization in DV25-446 consisting of  native silver, argentite and argentiferous galena in silica and iron  carbonate vein and vein breccia.
 
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 Table 1: Drill Hole Assays from Wolf Vein
 
 
 | Target | Hole ID | From (m) | To (m) | Length (m)* | Ag (g/t) | Pb (%) | Zn (%) | Au (g/t) |  | Wolf | DV24-446 | 816.30 | 838.00 | 21.70 | 1,422 | 3.05 | 1.42 | 0.51 |  | 
 | Including | 825.72 | 831.10 | 5.38 | 4,554 | 6.10 | 1.08 | 1.58 |  | 
 | including | 829.50 | 830.50 | 1.00 | 10,700 | 4.33 | 1.68 | 2.54 | 
 
 *All  intervals shown are core length. Estimated true widths vary depending  on intersection angles and range from 55% to 65% of core lengths,  further modelling of the new interpretation is needed before true widths  can be calculated.
 
 Table 2: Drill hole data for Wolf Vein holes reported in this release
 
 
 | Hole ID | Easting UTM83 (m)
 | Northing UTM83 (m)
 | Elev. (m)
 | Azimuth | Dip | Length (m)
 |  | DV24-446 | 466747 | 6173591 | 489 | 125 | -60 | 888 | 
 
 Quality Assurance and Quality Control
 
 The  Company adheres to CIM Best Practices Guidelines for exploration  related activities conducted on its property. Quality Assurance and  Quality Control (QA/QC) procedures are overseen by the Qualified Person.
 
 Dolly Varden QA/QC protocols are maintained through the  insertion of certified reference material (standards), blanks and field  duplicates within the sample stream. Drill core is cut in-half with a  diamond saw, with one-half placed in sealed bags and shipped to the  laboratory and the other half retained on site. Third party laboratory  checks on 5% of the samples are carried out as well. Chain of custody is  maintained from the drill to the submittal into the laboratory  preparation facility.
 
 Analytical testing was performed by ALS  Canada Ltd. in North Vancouver, British Columbia. The entire sample is  crushed to 70% minus 2mm (10 mesh), of which a 500 gram split is  pulverized to minus 200 mesh. Multi-element analyses were determined by  Inductively Coupled Plasma Mass Spectrometry (ICP-MS) for 48 elements  following a 4-acid digestion process. High grade silver testing was  determined by Fire Assay with either an atomic absorption, or a  gravimetric finish, depending on grade range. Au is also determined by  fire assay on a 30g split with either atomic absorption, or gravimetric  finish, depending on grade range. Metallic screen on a 1.0kg sample may  be completed on high-grade gold samples.
 
 Qualified Person
 
 Rob  van Egmond, P.Geo., Vice-President Exploration for Dolly Varden, the  "Qualified Person" as defined by NI 43-101 has reviewed and approved the  scientific and technical information contained in this news release.   Rob van Egmond, P.Geo. is not independent of the Company in accordance  with NI 43-101.
 
 About Dolly Varden Silver Corporation
 
 Dolly  Varden Silver Corporation is a mineral exploration company focused on  advancing its 100% held Kitsault Valley Project (which combines the  Dolly Varden Project and the Homestake Ridge Project) located in the  Golden Triangle of British Columbia, Canada, 25kms by road to tide  water. Including the Kitsault Valley Project, the Company has  consolidated approximately 100,000Ha of prospective tenure in the Golden  Triangle with 5 past producing high-grade silver mines including Dolly  Varden, Torbrit, Porter Idaho, Mountain Boy and Esperanza historic  mines. The 163 sq. km. Kitsault Valley Project hosts the high-grade  silver and gold resources of Dolly Varden and Homestake Ridge along with  the past producing Dolly Varden and Torbrit silver mines. It is  considered to be prospective for hosting further precious metal  deposits, being on the same structural and stratigraphic belts that host  numerous other, on-trend, high-grade deposits, such as Eskay Creek and  Brucejack. The Kitsault Valley Project also contains the Big Bulk  property which is prospective for porphyry and skarn style copper and  gold mineralization, similar to other such deposits in the region (Red  Mountain, KSM, Red Chris).
 
 Forward-Looking Statements
 
 This  release may contain forward-looking statements or forward-looking  information under applicable securities legislation that may not be  based on historical fact, including, without limitation, statements  containing the words "believe", "may", "plan", "will", "estimate",  "continue", "anticipate", "intend", "expect", "potential", "prospective"  and similar expressions. Forward-Looking statements involve known and  unknown risks, uncertainties, and other factors which may cause the  actual results, performance, or achievements of Dolly Varden to be  materially different from any future results, performance, or  achievements expressed or implied by the forward-looking statements,  including, without limitation, risks associated with the speculative  nature of exploration and development of minerals; the anticipates  substantial future capital expenditures associated with the exploration  and development of its assets and there can be no assurance that debt or  equity financing will be available; inherent competition in the mining  industry; risks associate with volatility in mineral prices; risks  inherent in the estimation of mineral resources; environmental risks  associated with the exploration and development of mineral properties;  the Company is reliant on key personnel; risks associated with working  in remote regions; risks associated with maintaining positive community  relations; and the other risks disclosed in the Company's annual  information form ("AIF") dated April 30, 2025 for the year ended December 31, 2024, which is available on SEDAR+ at  www.sedarplus.ca,  and in the Company's Form 40-F registration statement as filed with the  U.S. Securities and Exchange Commission, which is available on EDGAR at   www.sec.gov.  The risk factors identified in the Company's public filings are not  intended to represent a complete list of factors that could affect the  Company. Forward-looking statements are based on management's current  expectations and beliefs and assume, among other things, the ability of  the Company to satisfy the requirements of listing and registration, and  to successfully pursue its current development plans, that future  sources of funding will be available to the Company, that relevant  commodity prices will remain at levels that are economically viable for  the Company and that the Company will receive relevant permits in a  timely manner in order to enable its operations, but given the  uncertainties, assumptions and risks, readers are cautioned not to place  undue reliance on such forward-looking statements or information. The  Company disclaims any obligation to update, or to publicly announce, any  such statements, events or developments except as required by law.
 
 Neither  the TSX Venture Exchange nor its Regulation Services Provider (as that  term is defined in the policies of the TSX-V) accepts responsibility for  the adequacy or accuracy of this news release.
 
 For further information: Shawn Khunkhun, CEO & Director, 1-604-609-5137,  www.dollyvardensilver.com.
 
 
  SOURCE:  Dolly Varden Silver Corporation |