Thunder Gold intercepts 409.5 m averaging 0.307 g/t Au at Tower Mountain

Thunder Bay, Ontario--(Newsfile Corp. - September 22, 2026) - Thunder Gold Corp. (TSXV: TGOL) (FSE: Z25) (OTCQB: TGOLF) (" Thunder Gold " or the " Company ") is pleased to announce the following infill diamond drill results from the Bench Target, at the Company's flagship Tower Mountain Property, 40 kilometres west of Thunder Bay, Ontario.

Highlights:

TM26-214 intersected semi-continuous mineralization from surface to the end-of-hole, including 111.0 metres averaging 0.514 g/t Au;

TM26-212 intersected semi-continuous mineralization from 426.0 metres to the end-of-hole, terminating in 84.0 metres averaging 0.442 g/t Au;

Results indicate good to very good spatial correlation to the geological model and,

Results to date suggest actual drilled grades exceed predicted model grades.

The three holes summarized herein were drilled from west to east, within the 2026 MRE optimized pit limit (Reference Table 1.0 and Figure 1.0).

TM26-211 targeted the western interpolation limit of the current, 2026 MRE model, an area largely defined as waste. TM26-211 intersected 396.0 metres averaging 0.110 g/t Au from surface to the end-of-hole with scattered intervals greater than the current MRE cut-off grade (Reference Table 2.0).

TM26-212 was designed to evaluate the potential for southeast extension of the A-Target, 200 metres to the northwest. It also targeted the interpreted down-dip extension of the Bench Target at 400 metres down-hole. TM26-212 intersected 223.5 metres averaging 0.283 g/t Au and terminates with 84.0 metres averaging 0.443 g/t Au. The mineralization commenced at a depth of 376.5 metres and persisted to the end-of-hole.

TM26-214 was designed to cross the entirety of the Bench Target, a true width of approximately 200 metres. TM26-214 intersected 496.1 metres averaging 0.271 g/t Au within semi-continuous, variably brecciated an