Excelsior Mining Corp. announced the final assay results from the infill drill program on the Johnson Camp mine pits located in Cochise County, southeastern Arizona. Drill Program: Due to successful drilling in the NE corner of Burro pit, additional holes were added and those with assays returned are reported below.

The improved results will allow the Company to develop a mine plan that focusses on this new, higher-grade, mineralized zone. Permitting of the new leach pad to restart operations is in progress, however the additional drilling and metallurgical testing will push the Company's goal of restarting mining operations at JCM into 2023. The leaching potential of copper mineralization is defined as acid soluble copper plus sodium cyanide soluble copper divided by total copper.

All samples are prepared from manually split or sawn PQ or HQ core sections on site in Arizona. Drill core samples are then sent to Skyline Assayers & Laboratories in Tucson, Arizona for Total Copper and Sequential Copper analyses. Standards, blanks, and duplicate assays are included at regular intervals in each sample batch submitted from the field as part of an ongoing Quality Assurance/Quality Control Program.

Pulps and sample rejects are stored by Excelsior for future reference. The Johnson Camp Mine has historically been an open pit, heap leach operation since Cyprus Minerals opened the property in the 1970's. The operation includes two open pits, a two-stage crushing- agglomerating circuit, a fully functioning SX-EW plant capable of producing 25 million pounds of cathode copper per year, a complete set of PLS and raffinate ponds, and full infrastructure.