Report Date: July 26, 2018 Effective Date: June 14, 2018 MINE DEVELOPMENT ASSOCIATES MINE ENGINEERING SERVICES TECHNICAL REPORT AND RESOURCE ESTIMATED FOR THE TECHNICAL REPORT ON THE UNGA PROJECT DELAMAR AND FLORIDA MOUNTAIN GOLD – SILVER PROJECT, SOUTHWEST ALASKA, USA OWYHEE COUNTY, IDAHO, USA Submitted to: REDSTAR GOLD CORP. Qualified Persons: 409 Granville Street, Suite 1500 Michael M. Gustin, C.P.G. Vancouver, BC Canada, V6C 1T2 Steven I. Weiss, C.P.G. 775-856-5700 210 S Rock Blvd Reno, NV 89502 www.mda.com MINE DEVELOPMENT ASSOCIATES MINE ENGINEERING SERVICES CONTENTS 1.0 SUMMARY (ITEM 1) .................................................................................................................... 1 1.1 Property Description and Ownership ................................................................................... 1 1.2 Mining and Exploration History, and Historical Resource Estimates ................................. 2 1.2.1 Historical Resource Estimates ................................................................................. 3 1.3 Geology, Mineralization, and Drilling Results .................................................................... 3 1.3.1 Geological Setting ................................................................................................... 3 1.3.2 Mineralization and Drilling Results ........................................................................ 4 1.3.2.1 Shumagin Vein Zone ................................................................................. 4 1.3.2.2 Apollo and Sitka Vein Zones ..................................................................... 5 1.3.2.3 Centennial Gold Deposit ............................................................................ 5 1.3.2.4 Other Unga Island Prospects ...................................................................... 6 1.3.2.5 Other Popof Island Prospects ..................................................................... 7 1.4 Mineral Processing and Metallurgical Testing .................................................................... 7 1.4.1 Shumagin ................................................................................................................. 7 1.4.2 Centennial ................................................................................................................ 8 1.5 Conclusions and Recommendations .................................................................................... 8 2.0 INTRODUCTION AND TERMS OF REFERENCE (ITEM 2) .................................................. 10 2.1 Project Scope and Terms of Reference .............................................................................. 10 2.2 Frequently Used Acronyms, Abbreviations, Definitions, and Units of Measure .............. 11 3.0 RELIANCE ON OTHER EXPERTS (ITEM 3) ........................................................................... 13 4.0 PROPERTY DESCRIPTION AND LOCATION (ITEM 4) ........................................................ 14 4.1 Location .............................................................................................................................. 14 4.2 Land Area ........................................................................................................................... 14 4.3 Agreements and Encumbrances for Mineral Tenure.......................................................... 16 4.4 Surface Tenure Agreements and Encumbrances ................................................................ 18 4.5 Environmental Liabilities ................................................................................................... 18 4.6 Environmental Permitting .................................................................................................. 18 5.0 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE, AND PHYSIOGRAPHY (ITEM 5) ........................................................................................................ 19 5.1 Access to Property .............................................................................................................. 19 5.2 Climate ............................................................................................................................... 19 5.3 Physiography and Vegetation ............................................................................................ 20 5.4 Local Resources and Infrastructure .................................................................................... 20 775-856-5700 210 South Rock Blvd. Reno, Nevada 89502 FAX: 775-856-6053 Technical Report, Unga Project, Southwest Alaska, U.S.A. Redstar Gold Corporation Page ii 6.0 HISTORY (ITEM 6) ..................................................................................................................... 21 6.1 Exploration History ............................................................................................................ 21 6.2 Historical Mineral Resource Estimates .............................................................................. 24 6.3 Historical Production ......................................................................................................... 26 7.0 GEOLOGIC SETTING AND MINERALIZATION (ITEM 7) ................................................... 27 7.1 Regional Geologic Setting ................................................................................................. 27 7.2 Unga Island and Popof Island Geology ............................................................................. 27 7.3 Structural Architecture of Unga and Popof Islands ........................................................... 35 7.4 Mineralization at Unga Island ............................................................................................ 36 7.4.1 Shumagin Trend Mineralization ............................................................................ 38 7.4.1.1 Shumagin Vein Zone ............................................................................... 38 7.4.1.2 Pray’s Vein Prospect ................................................................................ 46 7.4.1.3 Bloomer Ridge ......................................................................................... 46 7.4.1.4 Orange Mountain ..................................................................................... 46 7.4.1.5 Pook Prospect ........................................................................................... 47 7.4.1.6 Aquila Prospect ........................................................................................ 48 7.4.2 Apollo – Sitka Trend ............................................................................................. 49 7.4.2.1 Sitka Vein Zone ....................................................................................... 49 7.4.2.2 Apollo Vein Zone .................................................................................... 51 7.4.2.3 Empire Ridge Prospect ............................................................................ 53 7.4.2.4 Rising Sun Prospect ................................................................................. 54 7.4.2.5 California Prospect ................................................................................... 54 7.4.2.6 Heather Prospect ...................................................................................... 54 7.4.3 Other Shumagin Island Prospects .......................................................................... 54 7.4.3.1 Zachary Bay ............................................................................................. 54 7.4.3.2 Norm’s Vein Prospect .............................................................................. 55 7.4.3.3 Junior Prospect ......................................................................................... 56 7.4.3.4 Chance Vein and Midway Prospects ....................................................... 56 7.4.3.5 Beach Vein ............................................................................................... 57 7.5 Mineralization at Popof Island ........................................................................................... 57 7.5.1 Centennial Gold Deposit ....................................................................................... 57 7.5.2 Other Popof Island Prospects ................................................................................ 58 7.5.2.1 Propalof Prospect Mineralization............................................................. 58 7.5.2.2 Suzy, Rhodo, and SoWhat Veins ............................................................. 59 7.5.2.3 Red Cove Alteration Area ........................................................................ 61 7.5.2.4 Digit Veins ............................................................................................... 61 8.0 DEPOSIT TYPES (ITEM 8) ......................................................................................................... 62 9.0 EXPLORATION (ITEM 9) ........................................................................................................... 63 9.1 Redstar 2011 ....................................................................................................................... 63 9.2 Redstar 2014 ....................................................................................................................... 63 9.2.1 Shumagin 2014 .....................................................................................................