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IsoEnergy Intersects Elevated Uranium Geochemistry at Radio

Drill Results

IsoEnergy Intersects Elevated Uranium Geochemistry at Radio

Vancouver, BC, April 11, 2017 – IsoEnergy Ltd. (“ IsoEnergy ” or the “ Company ”) ( TSXV:ISO ) is pleased to report

on exploration drilling results at the Radio uraniu m project in the eastern Athabasca Basin of Saskatc hewan.

Results include the intersection of elevated uranium geochemistry in drill hole RD17-27, and elevated nickel, a

common uranium pathfinder element, in several other drill holes.

IsoEnergy has completed a two-stage drilling progra m at Radio, where land accessible targets were dril led

during the period September to October 2016, whilst drilling of targets accessible upon ice formation was

completed in Q1 2017. IsoEnergy has an exclusive right to earn a 70% interest in the Radio property, which is

located 2 kilometres east of the Roughrider uranium deposit.

Radio Property Drilling

A total of 3,913 metres of drilling was completed i n 10 drill holes on the Radio property during Janua ry and

February, 2017. The focus of the program was to evaluate extensions of the moderate to strong basement clay

alteration zone discovered in October, 2016 for high grade basement hosted uranium mineralization. Depth

to the sub-Athabasca unconformity at Radio ranges from 170 to 190 metres.

Eight of the 10 drill holes targeted the basement c lay alteration zone. Some of the drilling infilled gaps on

sections tested in 2016, but most consisted of 200 metre step-outs along-strike or 50-100 metre step-outs up-

dip and down-dip. Drill hole RD17-27, a 50 metre step-out up-dip of 2016 drill hole RD16-21A, is the first drill

hole at Radio to encounter elevated uranium geochemistry. It intersected 143 ppm uranium over 0.2 metres

(240.5-240.7 metres) in a clay altered graphitic fa ult within the broader zone of basement clay altera tion.

Figure 2 is a cross-section through RD17-27 and Fig ure 3 is a core photo showing the location of the i nterval

within moderate to strong clay alteration and secondary hematite. Figure 2 shows that the intersection occurs

60 metres beneath the sub-Athabasca unconformity and is open in the up-dip direction.

With the receipt of the 2017 geochemistry results, an association between moderate to strong clay alteration

and the uranium pathfinder element nickel is evident. For example, a 96 metre interval of moderate to strong

basement clay alteration in drill hole RD17-25 averages 123 ppm nickel.

Figure 1 – Radio Planview

Figure 2 – Radio Cross Section SW1000E

Figure 3 – RD17-27 Core Photo

Qualified Person Statement

All scientific and technical disclosure contained i n this news release was prepared by Steve Blower, P .Geo.,

IsoEnergy’s Vice President, Exploration, who is a Qualified Person (as defined in National Instrument 43-101 –

Standards of Disclosure for Mineral Projects ). Mr. Blower has verified the data disclosed including the sampling,

analytical, and test data underlying the informatio n or opinions contained herein by reviewing origina l data

certificates and monitoring all of the data collect ion protocols. For additional information regarding the

Company’s Radio project, including its quality assu rance and quality control procedures, please see th e

technical report dated effective August 19, 2016 on the Company’s profile at www.sedar.com.

This news release refers to properties other than those in which the Company has an interest. Mineralization

on those other properties is not necessarily indicative of mineralization on the Company’s properties.

240.5-240.7 metres

143 ppm U

About IsoEnergy

IsoEnergy Ltd. is a well-funded uranium exploration and development company with a portfolio of prospective

projects in the eastern Athabasca Basin in Saskatch ewan, Canada and a historic inferred mineral resour ce at

the Mountain Lake uranium deposit in Nunavut. IsoEn ergy is led by a Board and Management team with a

track record of success in uranium exploration, development and operations. The Company was founded and

is supported by the team at its major shareholder NexGen Energy Ltd.

Craig Parry

President and Chief Executive Officer

IsoEnergy Ltd.

+1 778 379 3211

[email protected]

www.isoenergy.ca

Investor Relations

Kin Communications

+1 604 684 6730

[email protected]

www.isoenergy.ca

The TSXV has neither approved nor disapproved the c ontents of this press release. Neither the TSXV nor its

Regulation Services Provider (as that term is defin ed in the policies of the TSXV) accepts responsibil ity for the

adequacy or accuracy of this release.

Forward-Looking Information

This news release contains "forward-looking information" within the meaning of applicable Canadian securities

legislation. “Forward-looking information” include s, but is not limited to, statements with respect t o the

activities, events or developments that the Company expects or anticipates will or may occur in the fu ture,

including, without limitation, planned exploration activities. Generally, but not always, forward-look ing

information and statements can be identified by the use of words such as “plans”, “expects”, “is expec ted”,

“budget”, “scheduled”, “estimates”, “forecasts”, “i ntends”, “anticipates”, or “believes” or the negati ve

connotation thereof or variations of such words and phrases or state that certain actions, events or r esults

“may”, “could”, “would”, “might” or “will be taken” , “occur” or “be achieved” or the negative connotat ion

thereof.

Such forward-looking information and statements are based on numerous assumptions, including among

others, that the results of planned exploration activities are as anticipated, the price of uranium, the anticipated

cost of planned exploration activities, that genera l business and economic conditions will not change in a

material adverse manner, that financing will be ava ilable if and when needed and on reasonable terms, and

that third party contractors, equipment and supplie s and governmental and other approvals required to

conduct the Company’s planned exploration activitie s will be available on reasonable terms and in a ti mely

manner. Although the assumptions made by the Company in providing forward-looking information or making

forward-looking statements are considered reasonable by management at the time, there can be no assurance

that such assumptions will prove to be accurate.

Forward-looking information and statements also inv olve known and unknown risks and uncertainties and

other factors, which may cause actual events or results in future periods to differ materially from any projections

of future events or results expressed or implied by such forward-looking information or statements, including,

among others: negative operating cash flow and dependence on third party financing, uncertainty of additional

financing, no known mineral reserves or resources, potential forfeiture of the Radio Option Agreement, the

limited operating history of the Company, the influ ence of a large shareholder, alternative sources o f energy

and uranium prices, aboriginal title and consultation issues, reliance on key management and other personnel,

actual results of exploration activities being different than anticipated, changes in exploration programs based

upon results, availability of third party contractors, availability of equipment and supplies, failure of equipment

to operate as anticipated; accidents, effects of we ather and other natural phenomena and other risks

associated with the mineral exploration industry, e nvironmental risks, changes in laws and regulations ,

community relations and delays in obtaining governmental or other approvals.

Although the Company has attempted to identify impo rtant factors that could cause actual results to di ffer

materially from those contained in the forward-looking information or implied by forward-looking information,

there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no

assurance that forward-looking information and stat ements will prove to be accurate, as actual results and

future events could differ materially from those anticipated, estimated or intended. Accordingly, readers should

not place undue reliance on forward-looking stateme nts or information. The Company undertakes no

obligation to update or reissue forward-looking information as a result of new information or events except as

required by applicable securities laws.