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Thunder Gold Reports Exploration Diamond Drill Results from Bench Target At Tower Mountain Property

Thunder Gold Corp. reported exploration diamond drill results from the Bench Target at the Tower Mountain Property, 40 kilometres west of Thunder Bay, Ontario. TM26-205 identified significant new mineralization east of the current resource pit limit. All seven holes intersected mineralization above the current resource cut-off grade in areas previously estimated to be waste. Results demonstrate good to excellent correlation to the current resource model. TM26-207 and TM26-207A provide twinned hole results indicating minimal variation (less than 5%) over the first 40 metres of both holes. TM26-213 intersected 287.7 metres averaging 0.223 g/t Au, extending the mineralized trend to the southeast. Holes TM26-201, 205, 206, 207 and 208 were drilled perpendicular to the interpreted Tower Mountain Intrusive Complex contact probing the eastern extent of the variably brecciated and altered volcanic +/- intrusive horizon hosting the known gold mineralization of the Bench Target. This area was exclusively classified as waste in the 2026 Mineral Resource Estimate due to lack of drill coverage. Holes TM26-209 and TM26-213 were drilled sub-parallel to the interpreted Tower Mountain Intrusive Complex contact. All intervals above the Mineral Resource Estimate cut-off grade (0.19 g/t Au) offer potential to reduce the waste:ore strip ratio. The targeted area represents 66% of the total waste included in the 2026 Mineral Resource Estimate. All seven holes intersected intervals above the Mineral Resource Estimate cut-off grade as these already lie within the current Mineral Resource Estimate optimized pit shell. The most significant mineralization occurs in TM26-205 (121.5 metres averaging 0.376 g/t Au). This mineralization lies 200 metres east of the 2026 Mineral Resource Estimate resource pit limit, approximately 400 metres from surface. The target is open in all directions. TM26-213 was drilled parallel to the eastern Tower Mountain Intrusive Complex contact and was consistently mineralized from the collar to the end of the hole through an area of sparse drill coverage. Year-to-date, Thunder Gold Corp. has completed 6,600 metres of exploration drilling and 3,795 metres of resource definition drilling. All-in exploration costs for the year are approximately CAD 250 per metre. Thunder Gold Corp. plans to complete an additional 7,500 metres of resource definition drilling prior to year-end and estimates approximately 60 to 70% of that total will be included in the planned Mineral Resource Estimate update scheduled for year-end. Table 2.0 summarizes the significant results, by primary lithology. TM26-205 intersected the high grade core of the Bench Target near surface, intersecting 158.6 metres averaging 0.545 g/t Au within the brecciated and variably altered host rocks, including 54.0 metres averaging 1.088 g/t Au from surface to the interpreted limit of the Bench trend. The initial 158.6 metres of TM26-205 demonstrates good to excellent correlation to the current resource model, verifying the predictive accuracy in terms of both location and tenor of mineralization. The remaining 444.4 metres demonstrates poor correlation with the current resource model exclusively as a result of a lack of drill coverage which limits the predictive accuracy of the current resource model outside the currently drilled volume. TM26-213 intersected semi-continuous gold mineralization from surface to the end-of-hole returning 589.0 metres averaging 0.195 g/t Au over the entire drill hole. Approximately 50% of the hole lies within the current optimized pit. The remaining 50% of the hole suggests potential to expand the current resource beyond the currently defined optimized pit limit with a 64.5 metre long interval averaging 0.255 g/t Au observed at the current pit limit. TM26-213 demonstrates good to excellent correlation with the current resource model, verifying the predictive accuracy in terms of both location and tenor of mineralization. This hole demonstrates the consistency of grade across the main lithological contact between the volcanics and intrusive rocks which occurs at a depth of 291.7 metres. The 7,625-hectare, 100%-owned Tower Mountain Property is beside the Trans-Canada highway, 40-km west of Thunder Bay, Ontario. Gold mineralization occurs in variably brecciated and altered rocks surrounding the calc-alkalic Tower Mountain Intrusive Complex. Drilling to date has established an initial mineral resource parallel to the western contact of the intrusion representing approximately 25% of the Tower Mountain Intrusive Complex halo. The Mineral Resource Estimate has an effective date of January 19, 2026. The Mineral Resource Estimate is summarized as follows: Tower Mountain Mineral Resource Estimate - January 19, 2026: Indicated 34.5 million tonnes at 0.46 g/t Au for 514,000 ounces gold; Inferred 211.1 million tonnes at 0.45 g/t Au for 3,053,000 ounces gold. The calculated gold cut-off grade is 0.19 g/t Au. An average specific gravity value of 2.77 g/cm3 was used. The Mineral Resource Estimate used economic assumptions for open pit mining. The following economic parameters were used for generating the cut-off grade: a gold price of USD 3,000/oz, 80% recovery, open pit mining cost of USD 3.0/t, processing costs of USD 8.0/t, general and administration cost of USD 3.5/t, transportation cost of USD 2.5/oz of gold, and a royalty of 3%. The open pit used slope angles of 30° in overburden and 50° in fresh rock. The block model is orthogonal and has a parent block size of 5 m x 5 m x 5 m, with minimum sub-block size of 2.5 m x 2.5 m x 2.5 m. The open pit optimization used a re-blocked size of 10 m x 10 m x 10 m. The mineral resources described above have been prepared in accordance with the current Canadian Institute of Mining, Metallurgy and Petroleum Standards and Practices. Numbers have been rounded to the nearest million tonnes and nearest thousand ounces. Mineral Resources are not Mineral Reserves as they do not have demonstrated economic viability. The quantity and grade of reported Inferred Mineral Resources are uncertain in nature and there has been insufficient exploration; however, it is reasonably expected that a significant portion of Inferred Mineral Resources could be upgraded into Indicated Mineral Resources with further exploration. The remaining 75% of the Tower Mountain Intrusive Complex halo demonstrates similar geology, alteration, and geophysical signatures and is untested by drilling. A second gold trend, identified in 2026, outcrops at surface and is continuously mineralized over a 100-metre width. This gold mineralization occurs within Timiskaming-type conglomerates that have been traced for over 5.0 kilometres along a southwest trend paralleling the Thunder Lake Fault. Both targets offer opportunities to materially increase the total resource through systematic drilling.

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