Horizon Gold Limited announced a significant increase to the Company's total Mineral Resource Estimate (MRE) that includes updates to the Swan/Swift, Howards, Heron South, Specimen Well, and Kingfisher deposits, and maiden MRE's for the Kingston Town, Manikato, Think Big, Orion, Snook, Camel Bore, Psi, Eagle, and Wahoo prospects all within its 100% owned Gum Creek Gold Project (Gum Creek or the Project) located in the Murchison Region of Western Australia. Following 34,700 metres of infill and extension reverse circulation (RC) and diamond drilling completed at 16 priority targets in 2021, a revised total MRE of 36.83Mt @ 1.51g/t Au for 1.79Moz gold for the Gum Creek Gold Project (Table A), includes Indicated and Inferred resource classifications in accordance with the Australasian Code for Reporting of Identified Mineral Resources and Ore Reserves (JORC Code 2012 edition) with all resources located within granted mining leases. This updated MRE represents a 433,100oz (32%) increase in Indicated and Inferred gold when compared with the February 2021 MRE 1 at a discovery cost of less than AUD 14/oz 2.