Hayden Hill

Technical Documentation

NI 43-101 Technical Report

Review the independent NI 43-101 technical report for the Hayden Hill Gold-Silver Project. Join our mailing list and we’ll send a copy straight to your inbox.

Project History

  • Amax Gold Inc., a subsidiary of Amax Inc., bulk mined Hayden based on a shallow, disseminated mineralization model.
  • Historic drilling was limited in scope and depth: 742 holes (327,514 ft), avg. only 441 ft (<150m).
  • Approximately 480,000 ozs of gold and 1.3 million ozs of silver were recovered.
  • Amax Inc. merged with Cyprus in the mid-1990’s which led to the shutdown of Hayden’s operations to focus on copper and molybdenum projects.
  • Kinross acquired Amax Gold in 1998 for three properties — two to develop and one to mine. Kinross did not re-initiate mining or further explore Hayden.
Hayden Hill

Project Highlights

  • Hayden has not been drill-explored for 29 years.
  • During this period, exploration techniques and understanding of the low-sulfidation epithermal deposit model have significantly evolved.
  • The Four Nines geological team, through three-dimensional modelling of all available data, has determined that Hayden gold mineralization is structurally controlled and interpreted to be hosted in vein structures exposed at surface to continue at depth.
  • The core of the Hayden Hill property is composed of private lands.
Hayden Hill — Maps & Figures

3D Modelling

Four Nines has conducted comprehensive three-dimensional modelling of all available data sets for Hayden Hill:

  • High-grade gold mineralization occurs in structures that extend beneath and peripheral to where Amax mined gold.
  • The objective of 3D modelling was to determine the specific location of the gold mineralization mined by Amax.
  • Orange grade shells represent historically mined mineralization.
  • Mapped vein structures (green) are interpreted to be at the core of all high-grade gold zones.
  • The drill-defined high-grade gold target is shown in red.
  • The approved drill stations are positioned to target multiple untested high-grade gold structural corridors and deeper vein extensions below where Amax mined gold.
Hayden Hill — Maps & Figures

The Plan

  • Opportunity: Our expert geological team has applied an advanced understanding of Hayden Hill geology, and the low-sulfidation epithermal deposit model, to identify significant potential of undeveloped gold and silver mineralization.
  • Objective: Drill to confirm a data-driven understanding of significant mineralization below and peripheral to where gold was mined and revive a past-producing gold and silver mine.
  • Approval:  10 sites at < 1 acre total new disturbance for up to 25,000 feet of core drilling.
  • Drillhole Plan:   Drilling will target data-defined and modelled higher-grade mineralization, focusing on key structural corridors and deeper vein extensions.
  • Environmental Considerations:   Maximize current infrastructure and minimize new disturbances.
Hayden Hill — Maps & Figures

LOOKOUT PIT

  • Significant pit production by Amax
  • Multiple discrete mineralized veins (red)
  • Multiple exploration holes with intact mineralized intercepts
  • Excellent access on historical ramp
  • Multiple permitted drill sites

Targets

  • Historical drilling with high-grade intercepts
  • Northerly trending structures to depth and breccia bodies
Hayden Hill — Maps & Figures

NORTHERN HIGH-GRADE TARGET

  • High-quality, high-probability drill target
  • Multiple historical exploration holes indicate strong targets beneath the current pit
  • Proposed drill hole indicated in green
  • Open to depth

Targets

  • Northerly trending veins
  • Drill-indicated mineralization beneath the pit
  • High-grade
Hayden Hill — Maps & Figures

LOWER TELEGRAPH TARGET

  • High-quality, data driven drill target beneath historical pit wall
  • Drill targets are deeper extensions of the controlling veins and breccia
  • Proposed drill hole shown by green line

Targets

  • Two prominent parallel northerly trending mineralized structures
  • Projected feeder zone at depth (blue)
Hayden Hill — Maps & Figures

NOSE TARGET

  • Numerous high-grade values from surface samples, with the highest being 45.4 g/t Au.
  • The Nose Zone can be drill-explored, at depth, from a location at the bottom of the Lookout Pit (blue star)
  • Historical exploration of mineralized intervals correlates well to the modelled vein surfaces
  • Main NE trending vein set intersected by NW trending veins
  • Hydrothermal breccia bodies (blue) along, and at the intersection of, veins
  • Permitted drill site set to explore at depth

Targets

  • NE trending veins to depth
  • NE-NW vein intersections to depth
  • Hydrothermal breccia bodies
Hayden Hill — Maps & Figures

Phase 1 Drill Program

In July 2026, Four Nines Gold engaged LSG Drilling LLC, a California licensed contractor, to execute the Company's fully funded maiden drill program at Hayden Hill. This marks the operational commencement of the first modern drill campaign at the project in nearly three decades.

  • Program Scope: Up to 5,000 feet of core drilling from 10 fully permitted drill stations.
  • Mobilization: Began immediately following contractor engagement, with drilling anticipated to commence on or about July 17, 2026.
  • Targets: High-priority structural gold targets generated through modern 3D geological modelling and reinterpretation of the historic California gold system.
  • Exploration Focus: The program is designed to systematically test deeper, structurally controlled high-grade zones that were left untested by historical operators who focused on shallow disseminated mineralization.
  • Flexibility: Management retains the flexibility to expand the program beyond the initial 5,000 feet should drilling results and geological data warrant additional follow-up.
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