Thunder Bay, Ontario--(Newsfile Corp. - October 21, 2025) - Thunder Gold Corp. (TSXV: TGOL) (FSE: Z25) (OTCQB: TGOLF) ("Thunder Gold" or the "Company") is pleased to announce that Micon International Limited ("MICON") has been contracted to complete an NI 43-101 Mineral Resource Estimate ("MRE") at the Company's 100%-owned, 2,500-hectare, Tower Mountain Gold Property, located 50 kilometres west of Thunder Bay, Ontario.

The MRE shall evaluate the UV, Bench, Ellen, A, 110 and 3738 targets, arrayed along the western contact of the Tower Mountain Intrusive Complex ("TMIC") over a total strike length of 1,800 metres representing 20% of the total strike length surrounding the TMIC. A total of 161 diamond drill holes (35,389 metres), have been completed in this area to test these targets (Reference Figure 1.0).