Metallic Minerals announced the successful completion of its 2021 exploration programs at the company's 100%-owned Keno Silver project, adjoining Alexco Resource's high-grade silver mines in the Keno Hill silver district of Yukon, Canada. The multi-phase program consisted of Reverse Circulation ("RC") and diamond core drilling, Induced Polarization ("IP") geophysics, surface sampling, and district-wide stratigraphic and structural mapping across the 35-kilometer-wide district. The program, which began in June, was the Company's most extensive exploration campaign on the project to date, with 53 holes totalling nearly 6,200 meters ("m") along with 20.3 line-kilometers of deep-penetrating IP geophysical surveys. The 2021 Keno Silver work program was designed to achieve a number of important objectives: Expand the extent of drill-defined mineralization at the advanced target areas in the central and western parts of the Keno Hill silver district, namely Caribou, Homestake, and Formo towards initial resource estimates; Conduct follow-up drilling at the new discovery areas identified at East Keno in 2020 in order to begin to define the scale of mineralization along trend and to depth within these multi-kilometer-scale soil and geophysical targets; Complete first-pass reconnaissance drilling on additional untested multi-kilometer-scale targets in the eastern and central parts of the district; and Use new deep-penetrating IP geophysics, in conjunction with detailed surface mapping, to more accurately determine the potential scale of these newly identified mineralized systems. Metallic Minerals' 166 square kilometer Keno Silver project is the second-largest land position in one of the world's highest-grade silver districts, directly adjoining the operations of Alexco Resource Corp. The Keno Hill silver district has nearly 300 million ounces of silver in past production1 and current M&I resources2, with excellent existing infrastructure, including grid power, road access and nearby community services. The restart of mining operations at Keno Hill was the third mining operation to start producing in the Yukon Territory over the past two years. 2021 Exploration Program Overview: The 2021 Keno Silver drill program was designed to follow up on the successes of the 2020 program by building on the discoveries at East Keno and continuing to expand drill-defined mineralization at advanced-stage targets in the central and western parts of the Keno Hill silver district. In 2020, RC drilling intercepted significant silver mineralization in 26 of 30 reconnaissance holes, which effectively expanded the known extent of drill-defined mineralization by 10 kilometers to the east and demonstrated the potential for major new discoveries in this underexplored part of the district. Drilling in 2021 was comprised of a two-phase program, beginning with a first phase of RC drilling focused on reconnaissance drilling of untested soil and geophysical targets, along with follow-up drilling along strike and down dip on the new East Keno discoveries. The phase one program included 4,300 m of RC drilling in 45 holes focused on the East Keno and Central Keno target areas. This was followed by a second phase of deeper diamond core drilling program totalling 1,900 m in 8 holes in the East Keno and West Keno target areas. In addition to the focused drill program, Metallic Minerals undertook a comprehensive effort to expand the coverage of its detailed geologic and geophysical data coverage, particularly over the less-explored eastern half of the Keno Hill silver district where the Company has identified 12 separate multi-kilometer-long high-level soil and magnetic anomalies. This effort included district-wide stratigraphic and structural mapping focused in these important target areas for exploration and led to the identification of previously unrecognized regional scale thrust fault structures and associated styles of epithermal mineralization which have major implications for bulk tonnage potential that has not been previously investigated in the Keno Hill silver district. In conjunction with the detailed geologic mapping program, Metallic Minerals completed the first-ever application of deep-sensing IP geophysics using Simcoe Geoscience's Alpha IPTM system. This system has been used with great success on other Metallic Group projects and has the capability to image down to more than 800 meters depth from surface. Five separate multi-kilometer IP profiles were collected over the discovery areas at East Keno, as well as other targets in the central part of the Keno district, covering significant soil and magnetic anomalies. The 2021 survey was successful in identifying major conductive features that are spatially associated with areas with kilometer-scale soil and magnetic anomalies and with newly mapped regional thrust faults. The surveys yielded 35 high-priority targets that will be investigated in the upcoming 2022 program. Additional review and interpretation of this data is underway and a detailed discussion of the IP survey results, including relevant structure images, is expected in a subsequent news release. The following provides a snapshot of the activities completed at each of the major target areas on the Keno Silver project and are presented in the order that assay results are anticipated to be received and reported: Central Keno Drilling activity in 2021 began in the Central Keno target area, which covers the central 12 km of the 35 km wide Keno. Hill silver district and includes 90 million ounces of past production1 and current M&I resources2 from 8 separate deposits, including the namesake Keno Hill mine. A total of 37 RC holes were completed in the Central Keno target area which focused on expansion of drill defined mineralization at the advanced stage Caribou and Homestake targets, along with step-out drilling along trend and within several newly identified soil anomalies that remain open along trend from historically drilled areas. Two deep IP lines were also completed across the area which identified significant conductive features that spatially correspond with regional scale thrust fault structures and associated epithermal style silver mineralization. Assay results remain pending, and additional drilling is already planned at Caribou and Homestake in 2022 to advance both areas towards an initial resource estimate. East Keno: Drilling in the East Keno target area included 12 RC and diamond core holes and focused on step-out drilling along trend and down-dip of the discovery zones intersected in 2020 at Fox, Zone 2 and UKHM, in addition to reconnaissance drilling at the previously untested North Fox and West Cobalt targets. Metallic Minerals' drilling at East Keno has confirmed the presence of significant high-grade and bulk tonnage silver mineralization in this underexplored part of the Keno Hill silver district.