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Grande Portage Resources Ltd. advances the New Amalga Gold Project in Southeast Alaska, a gold project about 25 kilometers north of Juneau. News about GPTRF centers on NI 43-101 technical reporting, Preliminary Economic Assessment work, drilling and resource-definition programs, geotechnical and hydrogeological studies, and environmental data collection tied to project review and permitting.
Company updates also cover U.S. Forest Service authorizations, geochemical characterization and backfill testwork, socioeconomic impact analysis, access and infrastructure planning, and capital-markets status, including the company’s U.S. OTCQX trading under the symbol GPTRF.
Grande Portage Resources (OTCQB:GPTRF) has started a comprehensive Geochemical Characterization Program for the New Amalga Gold Project, with samples shipped April 24, 2026. Testing includes expanded acid-generation assays and the first-ever cemented rock fill (CRF) backfill creation and uniaxial compressive strength testing.
The project hosts an Indicated Resource of 1,438,500 oz Au (9.47 g/t) and Inferred 515,700 oz Au (8.85 g/t); a PEA (effective Feb 11, 2026) shows after-tax NPV5 US$721m and IRR 56% at US$3,200/oz.
Grande Portage Resources (OTCQB:GPTRF) filed a NI 43-101 Preliminary Economic Assessment (PEA) for the New Amalga Gold Project (effective date Feb 11, 2026) on SEDAR+ on April 21, 2026. The PEA supports continued project investment and outlines a 2026 program including ~4,300m diamond drilling, environmental baseline studies, and road easement work.
The report notes potential cashflow and NPV upside if regional CIP/CIL refining is available, and confirms no material differences versus the company’s April 15, 2026 summary.
Grande Portage Resources (OTCQB:GPTRF) announced a positive PEA for the New Amalga Gold Project in SE Alaska, showing a Base Case pre-tax NPV(5%) of US$979M and pre-tax IRR of 69% at US$3,200/oz gold. Key metrics include 1.05Moz LOM production, 7-year mine life, Pre-Production CAPEX of US$254.8M, and LOM AISC of US$1,408/oz.
The study models an underground selective mine with sensor-based ore sorting and offsite third-party processing to reduce onsite footprint and enable rapid payback.
Grande Portage Resources (OTCQB:GPTRF) contracted Timberline Drilling for up to 4,300 metres across up to 14 drillholes at the New Amalga Gold Project; drilling is expected to start in late June 2026 following an operations permit from the US Forest Service obtained in January.
The company is finalizing a NI 43-101 PEA expected late Q1 2026 and will pursue FAST-41 federal permitting after publication; project hosts an Indicated 1,438,500 oz Au at 9.47 g/t and Inferred 515,700 oz Au at 8.85 g/t.
Grande Portage Resources (OTCQB:GPTRF) received US Forest Service approval for its 2026 Plan of Operations to conduct drilling and fieldwork at the New Amalga Gold project in Southeast Alaska. The program allows up to 4,300 metres of diamond drilling from up to 14 drillholes, installation of instrumentation, surface mapping and trench sampling, with drilling expected to begin in late June 2026 per permit conditions. The project hosts an updated NI 43-101 MRE (effective July 17, 2024) with an Indicated 1,438,500 oz Au @ 9.47 g/t and Inferred 515,700 oz Au @ 8.85 g/t. A PEA is in progress and expected in Q1 2026.
Grande Portage (OTCQB:GPTRF) received a fully executed US Forest Service Special Use Permit on Jan 5, 2026 authorizing installation of long‑term environmental monitoring infrastructure at the New Amalga Gold Project in Southeast Alaska.
Authorized works include meteorological stations, stream gauging sensors, satellite uplink communications and power to support future air and water permits and design of a mine water treatment system. The project hosts an Indicated Resource of 1,438,500 oz Au @ 9.47 g/t and an Inferred Resource of 515,700 oz Au @ 8.85 g/t. A NI43‑101 PEA is in progress, expected Q1 2026.
Grande Portage (OTCQB:GPTRF) provided a December 16, 2025 update on transportation infrastructure for the New Amalga Gold Project in southeast Alaska.
Key advances include a State road easement application now in adjudication enabling initial State-land road construction and nearer helicopter staging; ADOT&PF awarded a US$28.5M Phase 1 contract for Cascade Point in July 2025 and the State signed a US$1.3M December 2025 contract to extend hydropower to Cascade Point. Goldbelt supplied next-phase dock engineering for a containerized ore barge dock. The project hosts an updated NI 43-101 Indicated resource of 1,438,500 oz Au @ 9.47 g/t and Inferred 515,700 oz Au @ 8.85 g/t.
Grande Portage (OTCQB:GPTRF) closed a non-brokered private placement of 20,000,000 units at C$0.25 per unit for aggregate gross proceeds of C$5,000,000 on December 9, 2025. Each Unit comprises one common share and one-half warrant; each whole warrant is exercisable at C$0.35 for 2 years.
Net proceeds will fund exploration and development of the New Amalga Gold deposit and general working capital. Securities are subject to a four-month hold expiring April 10, 2026. Subscriber Mr. Eric Sprott (through 2176423 Ontario Ltd.) now beneficially owns 35,000,000 shares and 10,000,000 warrants, about 19.7% non-diluted and 24% partially diluted.
Grande Portage Resources (OTCQB:GPTRF) announced a non-brokered private placement of 20,000,000 units at C$0.25 for gross proceeds of C$5.0 million, to be subscribed in full by Eric Sprott through a related vehicle. Each Unit includes one common share and one-half warrant; each whole warrant is exercisable at C$0.35 for two years. The company said net proceeds will fund exploration and development of the New Amalga Gold Project and general working capital, with securities subject to a four-month plus one day hold.
The release notes an Indicated Resource of 1,438,500 oz Au at 9.47 g/t and an Inferred Resource of 515,700 oz Au at 8.85 g/t (effective July 17, 2024). Closing is subject to TSXV approval; Mr. Sprott agreed not to exercise warrants that would push his stake above 19.99% until shareholder approval for control-person status is obtained.
Grande Portage Resources (OTCQB:GPTRF) announced an independent marketability offtake study for the New Amalga Gold Project dated December 1, 2025, validating third‑party offsite processing and sales outside China. The study found New Amalga material has high payable gold content and is attractive as a copper smelter feed due to high silica, enabling strong gold recoveries and payabilities. Multiple copper smelters outside China expressed interest. The project hosts an Indicated Resource of 1,438,500 oz Au at 9.47 g/t and an Inferred Resource of 515,700 oz Au at 8.85 g/t. A NI 43‑101 PEA is expected in Q1 2026.