Mr. Craig Parry reports

ISOENERGY BEGINS SUMMER URANIUM DRILLING PROGRAM AT THE GEIGER PROPERTY

IsoEnergy Ltd. has begun a program of follow-up core drilling targeting uranium mineralization at its 100-per-cent-owned Geiger property in the eastern Athabasca basin of Saskatchewan.

The property

The Geiger property is located 13 kilometres northwest of IsoEnergy's Radio property near several uranium deposits, mines and mills. The Roughrider and Midwest deposits are both within 20 kilometres of the property, as is Orano's McClean Lake uranium mine and mill.

Geiger is adjacent to the Wollaston-Mudjatik transition zone, a major crustal-scale structural zone related to most of the major uranium deposits in the eastern Athabasca basin. Sandstone cover at the property is thin and ranges between 101 metres and 358 metres. High-grade basement-hosted uranium mineralization is present on the property and it is the primary focus of IsoEnergy's exploration efforts. Historic drill hole HL-50 intersected 2.74 per cent triuranium octoxide (U3O8) over 1.2 metres in the basement on the H11 South conductor. Follow-up drilling completed by IsoEnergy in February of this year encountered a thick zone of weak uranium mineralization at the sub-Athabasca unconformity in drill hole GG18-09, 50 metres along strike to the southwest of drill hole HL-50. This intersection contained 0.03 per cent U3O8, 2,600 parts per million copper, 998 ppm nickel, 943 ppm zinc and 2.4 grams per tonne silver over 15.0 metres (207.0 to 222.0 metres). The long interval includes individual samples with up to 14,700 ppm Cu, 3,130 ppm Ni, 407 ppm Co, 3,670 ppm Zn and 6.4 g/t Ag.

Additionally, historic drill hole HL-76 was completed 1.6 kilometres along strike to the northeast along the same conductor as HL-50 and intersected 0.65 per cent U3O8 over 0.1 metre. Mineralization in HL-76 is located in the basement and is part of a broader 27-metre-thick zone of strong alteration and elevated geochemistry. Follow-up drilling by IsoEnergy in February of this year intersected 2.0 metres (271.2 to 273.2 metres) of 0.11 per cent U3O8, 2,227 ppm vanadium, 580 ppm Ni, 407 ppm cobalt and 1.5 g/t Ag in drill hole GG18-08. The interval includes 0.2 metre (271.2 to 271.4 metres) of 0.35 per cent U3O8, 9,320 ppm V, 2,060 ppm Ni, 1,560 ppm Co and 5.9 g/t Ag.

The program

The planned drilling program consists of 2,800 metres of core drilling in eight drill holes. There are two target areas in the general vicinity of the mineralization observed in drill holes GG18-08 and GG18-09, described above. Targets along strike to the southwest of GG18-09 and northeast of GG18-08 will be prioritized. One drill hole will also be completed on the newly acquired Larocque East property in an area of weak mineralization drilled by previous operators. Drilling operations are expected to be complete by the end of July, 2018.

Qualified person statement

The scientific and technical information contained in this news release was prepared by Steve Blower, PGeo, 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. 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.

About IsoEnergy Ltd.

IsoEnergy is a well-financed uranium exploration and development company with a portfolio of prospective projects in the eastern Athabasca basin in Saskatchewan, Canada, and a historical inferred mineral resource estimate at the Mountain Lake uranium deposit in Nunavut. IsoEnergy is led by a board and management team with a 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.

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