Drilling at O’Brien highlights opportunities for high-grade resource

www.radissonmining.com

For immediate release TSX-V: RDS, OTC: RMRDF, FRANKFURT: 2RX

Rouyn-Noranda, Qc

June 1, 2020

Drilling at O’Brien highlights opportunities for high-grade resource

growth east and west of the 36E and F Zones

8.35 g/t Au over 6.00 m, approx 300 m east of the 36E Zone, an area largely untested below 400 m

13.86 g/t Au over 2.10 m at the western margin of resources in the F Zone

Radisson Mining Resources Inc. (TSX-V: RDS, OTC: RMRDF): (“Radisson” or the

“Company") is pleased to announce significant high-grade gold intercepts from the ongoing

60,000 m exploration drill program at its O’Brien gold project located along the Larder Lake

Cadillac Break halfway between Rouyn-Noranda and Val-d’Or in Quebec, Canada (See figure 1

and 2). As announced previously, the program resumed on May 11th, after having paused on

March 24th, in response to Government of Quebec orders related to the COVID-19 pandemic.

“Drilling at O’Brien has continued to deliver excellent results. The initial part of our program was

successful in demonstrating strong continuity of high-grade mineralization in the 36E and F

zones down to a depth of 950 m, and within a mineralized trend similar to that historically mined

at O’Brien. This area remains a high priority target for us, with assays pending for holes OB-19-

98W1 and OB-19-98-W2, which intersected visible gold in mineralized zones to the west of and

above a previously released intercept of 66.71 g/t over 4.70 m.

We are also pleased that recent drilling has demonstrated the potential for a second mineralized

trend to the east, largely untested below 400 m. In particular, hole OB-20-124 returned 8.35 g/t

Au over 6.00 m (incl. 10.33 g/t over 3.00 m) intersecting what appears to be a high-grade

structure in a largely untested area, and highlighting a potential second steeply dipping trend

approximately 300 m east of the high-grade trend defined in the 36E Zone.

In addition, OB-19-111W2 intersected 13.86 g/t over 2.10 m (incl. 41.00 g/t Au over 0.70 m), 45

metres below a previously released intercept of 26.42 g/t Au over 2.05 m (in hole OB-19-111),

both intercepts near the western boundary of resources defined in the F Zone. These holes,

along with historical high-grade intercepts highlight an opportunity to add resources in the gap

between current resources and the old O’Brien mine.

Results released so far represent only ~35% of our planned 60,000 m program and we look

forward to further drilling these high potential areas in the coming weeks. With results continuing

to validate our litho-structural model, we are increasingly confident we can meaningfully grow

resources with upcoming drilling in what appears to be a target -rich environment. We are

pleased to have our exploration team onsite at O’Brien again, to resume our fully funded drill

campaign and look forward to releasing additional results in the coming weeks.” commented

Mario Bouchard, President and CEO.

Figure 3. O’Brien Project – Longitudinal vertical section - Looking North

MRE2019*(1000’sOzAu)

UTMElevaon(m)

(OzAu/v.meter)

10 20 30 40 50 60

330

285

240

195

150

105

60

15

-30

-75

-120

-165

-240

-255

-300

-345

-390

-435

-480

-525

-570

-615

-660

-705

-750

500

1,000

1,500

2,000

2,500

3000

-795

-840

-885

15.0+

12.5–15.0

10.0–12.5

7.5–10.0

6.0–7.5

5.0–6.0

GoldGrade

(g/tAu)

O’BrienMine FZone 36EZone KewagamaMine

IndicatedResourceoutline

InferredResourceoutline

SignificantResults

Currentrelease

FloangIntercepts>10g/tAu

UndergroundDevelopment

InferredResource

IndicatedResource

IndicatedResource/v.meter

InferredResource/v.meter

O’BrienProject-MRE2019*IndicatedandInferredResourcedistribuon@5.0g/tAucut-off

LongitudinalVercalSecon–LookingNorth

21.46gpt/1.70m

13.68gpt/0.31m

15.70gpt/1.00m

13.67gpt/2.25m

26.42gpt/2.05m

23.57gpt/2.60m

10.20gpt/2.00m

8.49gpt/2.00m

16.76gpt/4.00m

66.71gpt/4.70m

14.30gpt/2.00m

22.17gpt/1.80m

13.86gpt/2.10m

8.35gpt/6.00m

8.23gpt/2.20m

6.40gpt/3.00m

15.47gpt/2.00m

13.90gpt/1.40m

Previouslyreleased

Historicalintercepts

gptAu/m

gptAu/m

gptAu/m

OPEN

OPEN

OPEN

OPEN

OPEN

OPEN

OB-19-98W2

OB-19-98W1

VG–Assayspending

Mineralizedtrend 17.46gpt/1.00m

Exploration highlights - 36E and F Zones

Hole Zone From (m) To (m)

Length

(m)1

Grade

(g/t Au)2 Comments

OB-19-111W21 Zone F

608.10 610.30 2.20 8.23 Conglomerate

652.90 655.00 2.10 13.86 Larder Lake Cadillac Break

Including* 654.30 655.00 0.70 41.00

*Last available assay in

sequence.

Assays pending for 655.00

– 657.00m

OB-20-1181 Zone 36E

238.00 240.00 2.00 15.47 Pontiac Sediments

Including 238.00 239.10 1.10 27.20

364.00 366.00 2.00 5.58 Piché Group

Including 365.00 366.00 1.00 11.15

OB-20-122 Zone 36E

405.00 408.00 3.00 6.40 Piché Basalt

Including 405.00 406.10 1.10 11.66 Piché Basalt

OB-20-124 Zone 66E

463.00 469.00 6.00 8.35 Basalt / Conglomerate

Including 463.00 466.00 3.00 10.33

1. VG denotes the presence of visible gold

2. Core length or down hole width. True widths are estimated at 70% to 80% of down hole width. To the extent possible, primar y

intercepts reflect minimum mining width (1.5 m true width) consistent with assumptions used in the 2019 resource estimate.

3. Assay grades shown uncapped. A capping factor of 60 g/t was used in the 2019 resource estimate

4. Table includes only intercepts that meet 5 g/t cut-off and minimum mining width constraints used in the 2019 MRE. Complete

assay results available at www.radissonmining.com.

Zone 36E Exploration Highlights – Expansion opportunities to the east

• Hole OB-20-124 returned 8.35 g/t Au over 6.00 m from 460.00 m core length (vertical depth of

430 m)

o Intersected high grade structures in a sparsely drilled area

o Highlights potential second high-grade mineralized trend 300 m east of the high-grade

trend at the 36E Zone, open at depth

o Opportunity to expand high-grade resources, which are currently limited below 400 m.

• Hole OB-20-118 returned 15.47 g/t Au over 2.00 m from 238 m core length (vertical depth of

190.00 m) and 5.58 g/t Au over 2.00 m from 364.00 m core length (vertical depth of 300 m)

o Intersected mineralized structures (including visible gold occurrences) above and to the

east of OB-20-124 intercepts that appear to be part of the same trend

Figure 4. Second mineralized trend highlighted by OB-20-124 and OB-20-118

Results from hole OB-20-124, in conjunction with other recent results, appears to be defining a second

high-grade steeply dipping mineralized trend located approximately 300 m east of the high-grade trend

intersected by drilling down to a vertical depth of 950 m on 36E and F zones. While resources in this area

are largely limited to the upper 400 m, results from the ongoing campaign indicate a trend that links above

high-grade resources up to 175 m further down plunge. These results include the one from OB-20-124

published today, as well as 14.30 g/t Au over 2.00 m and 22.17 g/t Au over 1.80 m (Hole OB-19-106).

There are indications that the trend could extend deeper to 1,100 m where a historical intercept returned

17.46 g/t Au over 1.00 m. A recent deeper hole OB-20-113 drilled down to approximately 1,300 m

intersected the same structures but missed the intended target since it deviated at depth. Overall results

to date suggest strong exploration potential below 400 m for this sector and additional drilling is planned in

the coming weeks.

Figure 5. Visible gold in OB-20-118

Source. Radisson Mining Resources Inc.

Hole OB-20-118 intersected multiple zones including 15.47 g/t Au over 2.00 m from 238 m core

length in the Pontiac sediments and 5.58 g/t Au over 2.00 m from 364.00 m core length in the

Piché Group. Zones modeled in the Pontiac sediments appear to tie up with NNE faults and the

geological model has shown great accuracy at predicting the vertical and lateral extension of

those zones, in addition to the main targeted areas. In addition, visible gold was seen in two

intercepts including one in the Piché Group, which also appears to be part of the same trend.

F Zone Exploration Highlights – Expansion opportunities to the west

• Hole OB-19-111W2 returned multiple intercepts, including

o 10.10 g/t Au over 0.50 m from 598.80 m core length (vertical depth of 530.00 m) with

visible gold showing at 599.0 m

o 8.23 g/t Au over 2.20 m from 608.10 m core length (vertical depth of 535.00 m)

o 13.86 g/t Au over 2.10 m from 652.90 m core length (vertical depth of 580.00 m),

including 41.00 g/t Au over 0.70 m, from 654.30 to 655.00 m representing last received

assay in sequence with assays pending from 655.00 m to 657.00 m

• Near the western boundary of Inferred resources in the F-Zone and 45 m below previously

released intercept of 26.42 g/t Au over 2.05 m (in hole OB-19-111).

• These holes, along with high-grade historical intercepts outside the resource boundary highlight

resource growth potential to the west (gap between the F-Zone and the old O’Brien mine).

Figure 6. Visible gold showing in OB-19-111w2

Figure 7. Section highlighting OB-19-111, OB-19-111w2 and historical intercepts west of

current resources

Hole OB-19-111W2 returned 41.00 g/t Au over 0.70 m with the last assay. The results of the

remaining two metres of this hole are pending. The gap area between the old O’Brien Mine and

the F-Zone does not materially contribute to the current resource estimate and remains open

below 250 m. The high-grade intercepts in holes OB-19-111 and OB-19-111W2 were near the

western boundaries of inferred resource blocks in the F-Zone. These results along with a few

historical intercepts (not included in the current resource), suggest the potential to add high-

grade resources in this area, which remains largely untested. Additional drilling is planned in this

gap representing a strike length of approximately 200 m that has no resources below 250 m.

Additional drill targets are being refined on this sector and will be addressed in coming months.