Thunder Gold intersects 661.5 m of 0.554 g/t Au mineralization

Thunder Bay, Ontario--(Newsfile Corp. - August 11, 2026) - Thunder Gold Corp. (TSXV: TGOL) (FSE: Z25) (OTCQB: TGOLF) (" Thunder Gold " or the " Company ") is pleased to announce exploration diamond drill results from the Bench Target, at the Company's flagship Tower Mountain Property, 40 kilometres west of Thunder Bay, Ontario.

Highlights:

Longest continuously mineralized interval reported to date: 661.5 metres averaging 0.554 g/t Au;

Longest continuous interval greater than 1.0 g/t Au: 24.0 metres averaging 1.815 g/t Au;

Strong resource expansion relevance: 516.0 metres averaging 0.503 g/t Au inside 2026 Mineral Resource Estimate (" MRE ") pit shell;

Mineralization extends below the current pit shell : 145.5 metres averaging 0.731 g/t Au immediately below MRE pit shell;

Hole TM26-210 ended in mineralization: Supports the interpreted sub-vertical continuity of the Bench target and indicates the alteration system remains open down-dip.

TM26-210 targeted the interpreted continuation of the 300+ metre wide, sub-vertical zone of brecciated and altered volcanic-intrusive rocks of the Bench Target. The hole followed the eastern edge of the current optimized pit constraining the 2026 MRE, along the 100-metre interpolation limit utilized to estimate inferred resources. The hole lies 100 metres below holes TM21-120 (399.0 metres averaging 0.458 g/t Au) and TM22-134 (318.0 metres averaging 0.452 g/t Au) , both of which terminated prematurely in mineralization (Reference Figure 1.0). Elevated gold values were intersected 50 metres earlier than anticipated and continued 75 metres past the interpreted lower limit. The hole ended in mineralization suggesting potential to further increase the inferred resource at depth.

Wes Hanson, President and CEO, states, "TM26-210 was an across-the-board success, currently the best hole ever reported at Tower Mountain. The hole clearly demon