Mr. Jason Gigliotti reports

SIENNA RESOURCES DRILLS SIGNIFICANT SULPHIDE INTERSECTIONS AT THE CASE LAKE PROJECT

Sienna Resources Inc. has completed a three-hole diamond drilling campaign at its 100-per-cent-owned Case Lake project, 80 kilometres east of Cochrane, Ont. The drilling program totalled 1,026 metres (Table 1). Significant intervals of sulphide mineralization were intersected, including intercepts with disseminated and semi-massive to massive mineralization, hosted in strongly sheared, intermediate volcanic successions, with regions of recrystallized gabbro and metasedimentary rocks (Table 2). A total of 117 core samples were collected and these have been prioritized for processing and shipping to the lab for analysis. Management cautions that until the assay results are reported by the lab, the company is not certain of what concentration of metals, if any, will be contained in the drill core samples.

• Completed three diamond drill holes totalling 1,026 metres;
• Intersected multiple horizons of strong mineralization including disseminated and semi-massive to massive sulphide hosted in fine- to medium-grained volcanic rocks;
• 117 core samples selected have been immediately sent to lab for analysis.

Jason Gigliotti, president of Sienna Resources, stated: "We are pleased that the drilling was completed on time and on budget. I want to thank all involved for the great work. Based on what we have seen in the core, photos included, we are optimistic about the results from the drilling program and look forward to getting full assays back to determine the next course of action. We expect the results back in two to six weeks."

About Sienna Resources Inc.

Sienna has significantly increased acreage of the Stonesthrow gold project, consisting now of approximately 31,718 contiguous acres prospective for gold. Sienna has also recently acquired the 7,850-contiguous-acre Case Lake West project in Larder Lake mining division of Ontario, Canada, roughly 100 kilometres north of Kirkland Lake, Northeast Ontario. Sienna has also recently acquired the 10,357-acre Uranium Town project" bordering Denison Mines Corp., the now-23,134-contiguous-acre Dragon uranium project, bordering Cameco Corp. and the 55,440-acre Atomic uranium project in the world-renowned Athabasca basin of Saskatchewan. Also, Sienna has the Elko lithium project in Elko county, Nevada, consisting of approximately 1,830 contiguous acres directly bordering Surge Battery Metals' Nevada North lithium project, which announced the highest-grade lithium deposit in the United States. Sienna is also one of the larger landholders in Clayton Valley, Nev. Sienna's Clayton Valley projects include the Blue Clay lithium project, the Silver Peak South project and the Clayton Valley Deep Basin lithium project. Clayton Valley is home to the only lithium production in North America, that being Albemarle Corp's Silver Peak deposit. The Blue Clay lithium project is also near Tesla Motors Inc.'s Gigafactory in Nevada. On March 18, 2021, Schlumberger New Energy Venture announced the development of a lithium extraction pilot plant with a strategic partnership with Pure Energy. Management cautions that past results or discoveries on properties in proximity to Sienna may not necessarily be indicative of the presence of mineralization on the company's properties.

Qualified person

Curtis Ferron, MSc, PGeo, a qualified person as defined by National Instrument 43-101 has reviewed and approved the scientific and technical disclosure contained within this news release.

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