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Sienna Makes a New Lithium Discovery on Its 100% Owned Blue Clay Lithium Project in the Clayton Valley of Nevada

Exploration Programs

Sienna Makes a New Lithium Discovery on Its

100% Owned Blue Clay Lithium Project in the

Clayton Valley of Nevada

Vancouver, British Columbia--(Newsfile Corp. - March 25, 2022) - Sienna Resources Inc. (TSXV: SIE)

(OTC Pink: SNNAF) (FSE: A1XCQ0) ("Sienna" or the "Company") is pleased to announce

that the

maiden drill program has revealed a new lithium discovery on the 100% owned Blue Clay Lithium Project

in Clayton Valley, Nevada (See map below).

Lithium values as high as 1230 ppm Li were encountered

with 800 ppm Li over 120 feet, including 1,011 ppm Li over 40 feet.

The Blue Clay Lithium Project

consists of 150 contiguous claims totaling approximately 2,950 acres prospective for lithium right in the

heart of the Clayton Valley in Nevada, which is currently

home to the only producing lithium region in

North America.

Jason Gigliotti, President of Sienna Resources, states: "We are very pleased to have made a new

lithium discovery on the maiden drill program in the Clayton Valley of Nevada.

Domestically sourced

lithium is in massive demand especially in light of recent global events.

We couldn't be more excited

about this new discovery and are immediately planning the next phase of drilling to delineate the lithium

held within the property.

I was recently down on the property and am very optimistic about the short and

long term future this project will have on the growth of Sienna Resources.

When you factor in that lithium

prices are at their all-time high today, management is very enthused about this new discovery."

Clayton Valley Map

To view an enhanced version of this graphic, please visit:

https://orders.newsfilecorp.com/files/854/118062_f65997de54073ae8_002full.jpg

About Sienna Resources Inc.

Sienna Resources is focused on exploring for and developing high-grade deposits in politically stable,

environmentally responsible and ethical mining jurisdictions. Sienna is partnered with a New York Stock

Exchange-listed mining company on two separate projects in Scandinavia including the past-producing

Bleka and Vekselmyr orogenic gold projects in southern Norway which are both greenstone-hosted gold

systems, and the Kuusamo platinum group elements (PGE) project in Finland directly bordering the LK

Project being advanced by Palladium One Mining Inc. In North America, Sienna's projects include the

Marathon North platinum-palladium property in Northern Ontario directly bordering Generation Mining

Ltd.'s 7.1-million-ounce palladium-equivalent Marathon deposit. Sienna also has the Clayton Valley

Deep Basin Lithium Project in Clayton Valley, Nev., home to the only lithium brine basin in production in

North America, in the direct vicinity of Albemarle Corp.'s Silver Peak deposit and Tesla Motors Inc.'s

Gigafactory and the recently acquired Blue Clay Lithium Project in Clayton Valley Nevada. Management

cautions that past results or discoveries on properties in proximity to Sienna may not necessarily be

indicative to the presence of mineralization on the company's properties.

Qualified Person

Mr. Frank Bain, 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.

If you would like to be added to Sienna's email list, please email

[email protected]

for

information or join our twitter account at

@SiennaResources

.

Contact Information

Tel:

1.604.646.6900

Fax: 1.604.689.1733

www.siennaresources.com

[email protected]

"Jason Gigliotti"

President, Director

Sienna Resources Inc.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the

policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this

press release.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/118062