Ontario Gold Portfolio Heats Up: Heritage Mining Reports Advances Towards Drilling (Melba), New Results, and Extends Vein Structure (Contact Bay and DBL)

Melba Project:

• Diamond drilling permit application submitted

• Validation of historical mine layout plans as ground team has identified possible inconsistencies with shaft and drill hole positions relative to existing georeferenced maps and previous diamond drill program 3D model.

• Historical winter drill trail currently being upgraded in preparation for diamond drill mobilization

• Mobilization of drill rig to commence shortly after trail is improved for transport

Melba Mine Exploration Plan Highlights (Figure 1, 2) - October 15, 2025 Press Release:

• Diamond Drilling Q4 2025/Q1 2026 designed to confirm multiple high-grade historical results (Figure 1, 3-6), 26 Diamond Drill holes totalling ~1,780m:

• Historical Highlights (See figure 1,2)

  • Up to 23.27 g/t Au Over 4.5m and 6.59 g/t Au Over 12.87m near Surface

  • Multiple occurrence of visible gold in multiple drill holes and surface workings (Figure 1,2)

• Systematic Sampling of Ore and Rock piled located in close proximity to the Melba Mine (Figure 1)

  • Ore Pile 2012 Bulk Sample results average grade of 3.99g/t, ore pile estimated to be 2000 short tonnes or 230.90 oz Au estimated (Nordex Explosives Ltd. Report June 25, 2012), Figure 1 o Rock Piles historically sampled up to 2.23g/t Au (Advanced Exploration Data, 2025)

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Figure 1: Melba Property - Historical Map

"We continue to be very impressed with the Melba Mine from historical reports. We look forward to systematically confirming historical high-grade results in the near term and developing this project. I have visited with the team and they are making great progress in addition to other meetings creating new relationships in the area. We have now identified multiple access routes and core shack locations. Access to skilled labour, infrastructure and equipment is very convenient in this area." Commented Peter Schloo, President, CEO and Director of Heritage Mining Ltd.

Figure 2: Melba Historical Highlight Compilation from Assessment reports and Historic Maps, Historic calculations have been re-calculated to g/t Au from 35$ gold, the Company used Troy Ounce

Contact Bay

Confirmed Gold mineralization below old mine

• DDH RGN25-003: 1.47g/t Au over 2m from 84m confirming gold mineralization under Rognon Mine Workings (Figure 3)

Intermediate intrusion cutting through the mafic volcanics associated with gold mineralization (Figure 3):

• DDH RGN25-004:

  • 2.25 g/t Au over 2m from 101m including 4.31g/t over 1m

  • 3.67g/t Au over 1.28m from 109m including 7.56g/t Au over 0.55m (visible gold observed in core)

  • 0.94g/t Au over 1.05m from 258.64m including 1.76g/t Au over 0.55m

0.69g/t Au over 5m from 104m

• DDH RGN25-007: 1.09g/t Au over 3m from 104m

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Figure 3: Contact Bay Project - Rognan Mine Diamond Drill holes over UAV Mag inversion model (2024)

"The Contact Bay Diamond Drill Exploration program was another technical success. No historical drilling data available before our program combined with confirming gold mineralization around an old gold mine from the early 1900's now needs to be incorporated into the larger picture of project and further exploration is warranted. Considerable efforts had been made to work a trail into the Rognon Mine Area which we can now take full advantage of. We look forward to communicating our next steps on the project to our stakeholders." Commented Peter Schloo, President, CEO and Director of Heritage Mining Ltd.

Drayton Black Lake

Confirms anomalous gold values in system ~185m north-northeast extending the mega quartz vein structure, Figure 4. These results when compared to soil sample and stripping program results are designed to provide a playbook for larger scale exploration to identify significant gold mineralization. These results when overlay with other geochemical results pending should provide a path toward discovery.

• • DDH25-016:

    • 0.10g/t Au over 8m from 88m including (0.12g/t Au over 1m from 88m, 0.23g/t Au over 2m from 91m, 0.13g/t Au over 1m from 95m)

    • 1.03g/t Au over 1m from 102m

  • DDH25-017: 0.28g/t Au over 1m from 72m, 0.90g/t Au over 1m from 76m, 0.45g/t Au over 2m from 82m

  • DDH25-018 : Results Pending

• Soil orientation program - Results Pending

• Stripping - Pending ?results

• Rock Pile Results from Alcona and Split Lake, Assays Pending

"The Drayton Black Lake project diamond drilling results have been a technical success extending gold mineralization along strike. We look forward to additional geochemical program results to complement our new findings from the Mega Quarts Vein Structure. This is a new structural discovery, we look forward to systematically developing this area." Commented Peter Schloo, President, CEO and Director of Heritage Mining Ltd.

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Figure 2: DBL Project - Zone 3 Extension 2025 Fall Drill Program with 2024 Drone Mag Survey

Qualified Person

Mitchell Lavery P. Geo, Strategic Advisor for the Company, serves as a qualified person as defined by National Instrument 43-101 - Standards of Disclosure for Mineral Projects and has reviewed the scientific and technical information in this news release, approving the disclosure herein.

Quality Assurance/Quality Control (QA/QC)

Technical Program

Heritage Mining adheres to a strict QA/QC protocol for handling, sampling, sample transportation and analyses. Chain-of-custody protocols are designed to ensure security of samples until their delivery at the laboratory. Sampling, Sub-sampling, and Laboratory Analysis for Heritage Mining Drayton Black Lake Project and Contact Bay. All drilling at the Drayton Black Lake and Contact Bay projects recovers NQ core. Drill core is systematically split in half using a diamond saw. A qualified geologist examines the drill core, marking intervals for sampling and indicating the cutting line. Sample lengths are typically 1.0 metre, adjusted to a minimum length of 0.5 metre as necessary to respect lithological and/or mineralogical contacts and to isolate narrow veins or structures that may contain higher-grade mineralization. Technicians saw the core along the cutting lines determined by the geologist. One half of the core is retained as a witness sample, while the other half is submitted for analysis. Individual sample bags are securely sealed and placed into sealed bags, which are then clearly marked with their contents. Heritage Mining submits samples for gold determination by PhotonAssay to ALS Canada Ltd. ("ALS"). ALS operates under a commercial contract with Heritage Mining. Drill core samples are shipped to ALS for sample preparation at their facilities in Thunderbay Ontario. ALS is an ISO/IEC 17025:2017 accredited laboratory for the PhotonAssay method in addition to a variety of diverse metal determination methods. Analytical Procedures The ALS procedure for PhotonAssay involves lab applying preparation codes LOG-21 (sample logging via barcode), CRU-31 (fine crushing so that 70% passes through a 2mm screen) and SPL-32a (rotary splitting of a representative ~500g subsample) followed by analytical code Au-PA01 which is a non-destructive gold analysis method using high-energy X-rays with a gold detection range from 0.03 ppm to 350ppm. After gold assays are returned, Heritage then may choose to perform multi-element assays on selected samples based on the gold results. In these cases, sample preparation codes FND-05 (locate and use remaining crushed material from Au-PA01) and PUL-32m (pulverization so that >85% passes 75 µm screen) are then applied followed by analytical code ME-MS61 (multi-element ICP-MS analysis for base metals, pathfinder elements, lithophile elements and rare earth elements).

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The drill program design, QA/QC, and interpretation of results are performed by qualified persons employing a rigorous QA/QC program consistent with industry best practices. Standards and blanks account for a minimum of 10% of the samples, in addition to the laboratories' internal quality assurance programs. Quality Control data are meticulously evaluated upon receipt from the laboratories for any failures. Appropriate corrective action is taken if assay results for standards and blanks fall outside allowed tolerances. All results disclosed by Heritage Mining have successfully passed the Company's stringent quality control protocols. The Company does not recognize any factors of drilling, sampling, or recovery that could materially affect the accuracy or reliability of the assay data disclosed. The assay data disclosed in this press release have been verified by the Company's Qualified Person against the original assay certificates. Heritage Mining notes that it has not completed any economic evaluations of its Drayton-Black Lake Project, and the project does not currently have any resources or reserves.

ABOUT HERITAGE MINING LTD.

The Company is a Canadian mineral exploration company advancing its two high grade gold-silver-copper projects in Northwestern Ontario. The Drayton-Black Lake and the Contact Bay projects are located near Sioux Lookout in the underexplored Eagle-Wabigoon-Manitou Greenstone Belt. Both projects benefit from a wealth of historic data, excellent site access and logistical support from the local community.

For further information, please contact:

Heritage Mining Ltd.

Peter Schloo, CPA, CA, CFA

President, CEO and Director

Phone: (905) 505-0918

Email: peter@heritagemining.ca

FORWARD-LOOKING STATEMENTS

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