Montero Completes Exploration Programs at Potrero Gold Project and Advances Data-Driven Targeting Strategy

Toronto, Ontario--(Newsfile Corp. - March 9, 2026) - Montero Mining and Exploration Ltd. (TSXV: MON) (OTC Pink: MXTRF) (FSE: ES0) ("Montero" or the "Company") is pleased to announce the completion of a comprehensive data compilation and detailed exploration program at its Potrero gold project in Chile's Maricunga Belt, a a well-established gold mining district in northern Chile. The program incorporates advanced data analytics and modelling tools, including machine learning techniques, as part of the Company's ongoing interpretation process.

The Potrero Project is located approximately 50 km southeast of El Salvador and approximately 20 km north of Kinross' La Coipa gold-silver mine in a well-established mining district hosting Kinross' Lobo mine, Gold Fields' Salares Norte gold mine, and Rio2's Fenix gold project (see Figure 1). The Project comprises a contiguous package of mining concessions covering the interpreted hydrothermal alteration footprint and structural corridors identified to date. A concession map with simplified geology is presented in Figure 2.

Figure 1: Regional location map of the Potrero Project, Maricunga Belt, Chile.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/11789/287762_p1.jpg

Figure 2: Potrero Project concession boundary and simplified geological map.

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https://images.newsfilecorp.com/files/11789/287762_p2.jpg

*Adjacent property Mineral Resource and Mineral Reserve estimates shown in Figure 1, including those for Salares Norte, Fenix Gold, La Coipa and Lobo-Marte, are derived from publicly available disclosures prepared by the respective owners in accordance with applicable securities regulations, including: ¹Gold Fields Limited, Salares Norte Technical Report Summary (effective 31 December 2024); ²Rio2 Limited, NI 43-101 Feasibility Study Technical Report for the Fenix Gold Project (effective 16 October 2023); and ³Kinross Gold Corporation, La Coipa and Lobo-Marte Mines Mineral Reserve and Resource Statement as at 31 December 2024, prepared in accordance with CIM Definition Standards. Such information is not necessarily indicative of mineralization on the Company's Potrero project.