Bonterra Congratulates Gold Fields and Cree Partners on Landmark Impact Benefit Agreement for The Windfall Project

Val-d'Or, Quebec--(Newsfile Corp. - June 3, 2026) - Bonterra Resources Inc. (TSXV: BTR) (OTCQX: BONXF) (FSE: 9BR2) ("Bonterra" or the "Company") congratulates Windfall Mining Group Inc. ("Windfall Mining"), a wholly owned subsidiary of Gold Fields Limited ("Gold Fields"), together with the Cree First Nation of Waswanipi, the Cree Nation Government and the Grand Council of the Crees (Eeyou Istchee), on the signing of a landmark Impact Benefit Agreement for the Windfall Project, known as the Uukiimau Agreement. Bonterra is partnered with Gold Fields on the Phoenix JV, which is adjacent to the Windfall Project, under a definitive earn-in and joint venture agreement (the "JV Agreement") with Windfall Mining (see press release dated November 28, 2023).