Ssr Mining Provides September 2017 Exploration Update

News Release 17-23

SSR Mining Inc. PHONE +1 604.689.3846 Suite 800 - 1055 Dunsmuir Street

www.ssrmining.com TOLL FREE +1 888.338.0046 PO Box 49088

Vancouver, BC, Canada V7X 1G4

September 5, 2017

SSR MINING PROVIDES SEPTEMBER 2017 EXPLORATION UPDATE

VANCOUVER, B.C. – SSR Mining Inc. (NASDAQ: SSRM) (TSX: SSRM) (“SSR Mining”) provides

an update on its exploration activities and results at its Marigold mine in Nevada, U.S., Seabee

Gold Operation in Saskatchewan, Canada, and SIB project in British Columbia, Canada for the

period from April 1, 2017 to July 31, 2017 (the “Exploration Period”).

Highlights:

 Drill results at the Seabee Gold Operation include:

 At Santoy Gap, drillhole SUG-17-019 intersected 27.70 g/t gold over 2.5 meters true width;

 At Santoy Gap HW, drillhole SUG-17-300 intersected 26.55 g/t gold over 2.8 meters true

width;

 At Santoy 8A Footwall, drillhole SUG-17-917 intersected 7.17 g/t gold over 7.0 meters true

width; and

 At Carr, drillhole CAR-17-014 intersected 31.64 g/t gold over 1.1 meters true width.

 Drill results at the Marigold mine include:

 Within the Mackay pit, drillhole MRA6503 intersected 2.50 g/t gold over 33.5 meters; and

 At East Basalt, drillhole MRA6453 intersected 1.37 g/t gold over 79.2 meters.

 SIB project drilling encountered the prospective Salmon River Formation over the strike length

of the area tested.

Paul Benson, President and CEO said, “ After 25 years of continuous operation, both Marigold

and Seabee continue to generate new drill results further demonstrating the quality and robust

nature of these ore bodies. At Seabee, in addition to the high grade results in existing resource

zones, results in the newly defined Santoy Gap Hanging Wall structure and the first high grade

hit at the Carr target are very encouraging. At Marigold, we have encountered multiple gold

intercepts above reserve grade and resources are expected to show continued growth. These

results provide continued justification of ou r investment strategy in brownfields exploration to

maximize the value of each operation.”

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Seabee Gold Operation, Canada

Underground diamond drilling activities for the Exploration Period focused on Mineral Resource

conversion at the Santoy 8A and Santoy Gap areas at the Santoy mine. We also completed both

underground exploration and Mineral Resource upgrade drilling at the Seabee Mine. During the

Exploration P eriod, we completed 20,938 meters of underground drilling at the Santoy and

Seabee mines, and an additional 7,727 meters of surface exploration drilling for extensions close

to both mines. Exploration drilling on targets at the Carr, Porky and Santoy 7 areas totaled 4,600

meters during the Exploration Period.

Infill drill results from the Santoy 8 A area are expected to upgrade Measured and Indi cated

Mineral Resources as demonstrated by 7.0 meters at a grade of 7.17 g/t gold and 6.3 meters at

a grade of 7.43 g/t gold in drillholes SUG -17-917 and SUG-17-918, respectively (see Figure 1).

There are up to three parallel mineralized planes at Santoy 8, known as 8A, 8A Footwall, and 8B.

These results , taken together with results reported in our previous 2017 exploration news

releases, are expected to upgrade a portion of current Mineral Resources when we r eport our

Mineral Resources and Mineral Reserves estimates for year-end 2017.

Figure 1 also highlights results from infill and step out drilling at Santoy Gap on the 9A and 9C

zones. Examples of drill intercepts at the 9A area during the Exploration Period include 2.5 meters

at a grade of 27.70 g/t gold and 5.5 meters at a grade of 12.35 g/t gold in holes SUG-17-019 and

SUG-17-041, respectively, and at the 9C area include 5.8 meters at a grade of 6.42 g/t gold in

drillhole SUG-17-042. These results are expected to upgrade Mineral Resources.

Additionally, we received i nfill drilling results at the Santoy Gap Hanging Wall (“Gap HW”) area,

which is positioned approximately 200 meters in the hanging wall of the Santoy Gap mineralized

zones. This area was tested with one core hole successfully intercepting 2.8 meters at a grade of

26.55 g/t gold in drillhole SUG -17-300. Gold mineralization at Gap HW comprises granodiorite -

hosted quartz veinlets and disseminated sulphides that parallel the Santoy shear zone. Th is

result is shown as a projection to a vertical plane in Figure 1 and remains open up and down

plunge for further follow up to potentially define a new mineralized zone distinct from areas within

the current Mineral Resources.

Early in the Exploration P eriod we completed drilling on near -surface targets up to several

kilometers distant from underground infrastructure. At the Carr target, located four kilometers to

the north of Santoy Gap (see Figure 2), we received a high grade result , drillhole CAR-17-014,

with geologic similarities to Santoy Gap , which returned 1.1 meters at a grade of 31.64 g/t gold.

This intercept warrants follow up during the next winter drill campaign and may follow a similar

historic drill pattern to the Santoy Gap discovery in 201 1. Carr results represent a new area of

gold mineralization with the potential to generate new Inferred Mineral Resources.

In June 2017, we began field work at the Fisher project to examine the nature of the existing

showings, and to systematically explor e the southern extension of the Santoy shear zone. The

objectives were to identify and prioritize drill targets to be drilled in the second half of 2017. As of

July 2017, we completed soil and till sampling, mapping and prospecting over a 12-by-2-kilometer

area, and have found quartz veining and alteration of meta -volcanic rocks consistent with the

assemblage found at Santoy Gap. Results from this prospecting and sampling program, along

with the outcrops containing visible gold, form the basis, in part, f or our drilling planned at the

Fisher project for the second half of 2017.

However, due to ongoing wildfire conditions in and around the Fisher project area, exploration

activities were suspended in August 2017. While the camp and drill equipment have not sustained

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damage, we do not anticipate re-deploying exploration personnel until the fourth quarter of 2017

due to the proximity of wildfires and the remote nature of the camp location.

Marigold mine, U.S.

Mineral Resource conversion drilling at the Ma ckay pit and East Basalt continued in the

Exploration Period with results expected to replace 2017 depleted Mineral Reserves. Additional

drilling is ongoing with the potential to expand Mineral Resources and Mineral Reserves to be

reported in our year-end 2017 Mineral Resources and Mineral Reserves estimates.

Exploration activities at Marigold continued our focus on Mineral Reserve and Mineral Resource

growth within and adjacent to our existing pits. The targets explored were Mackay pit, East Basalt

and North Red Dot, as shown in the Figure 3. During the Exploration Period, we drilled 67 reverse

circulation (“RC”) drillholes totaling 19,776 meters in the targeted areas. Year -to-date, we have

drilled 111 RC holes totaling 30,031 meters on the Marigold mine property, which does not include

the core hole targeting potential deeper high-grade sulphide gold mineralization.

In an area of the central Mackay pit , we received results of 1.35 g/t gold over 67.1 meters and

2.50 g/t gold over 33.5 meters from drill holes MRA6444 and MRA6503 , respectively. Both

drillholes returned gold grades in excess of our modelled Mineral Resources grade in this area

(see Figure 4). Additionally, significant new gold mineralization was intersected 100 meters down

dip of our Mineral Reserve pit boundary in the central Mackay pit area. This includes a result of

0.47 g/t gold over 59.4 meters from drillhole MRA6502 which is expected to expand Mineral

Resources.

At East Basalt, where we are drilling east of a previously mine d pit, we received favorable assay

results confirming widths and gold mineralization expected to expand Mineral Resources.

Examples of these results are an interval of 79.2 meters at a grade of 1.37 g/t gold in drillhole

MRA6453, and an interval of 54.9 meters at a grade of 0.69 g/t gold in drillhole MR 6488 (see

Figure 5).

Subsequent to our acquisition of the Marigold mine in 2014, we initiated a deep sulphide

exploration program to test for a deeper, high -grade sulphide gold deposit in a setting similar to

the Turquoise Ridge gold deposit, which is located 55 kilometers north of Marigold. In May 2017,

we completed core drillhole DDH6421, previously reported, which intersected 43.0 meters at a

grade of 0.39 g/t gold, including 0.15 meters at a grade of 9 .86 g/t gold (see Figure 3 and our

news release dated August 9, 2017 ). Importantly, this mineralization was found in moderately

pyritic, sheared carbonaceous mudstone that can be correlated with the Comus Formation, which

is one of the host rock types at Turquoise Ridge.

SIB Project, Canada

The SIB project is located four kilometers south along trend from the high -grade, past-producing

Eskay Creek gold mine. Importantly, the SIB project is one of the few exploration projects in the

district with similar style mineralization and setting as the former Eskay Creek mine . Previous

drilling indicated that high grade gold mineralization is present at the project. Previous work at the

SIB project explored the near-surface targets with only limited exploration of the deeper massive

sulphide potential that we are currently targeting. Our current phase I drill program is exploring a

large panel of altered and mineralized rocks correlative to those of the Salmon River Formation

that hosted the Eskay Creek depo sit. Using our knowledge of the Eskay Creek deposit , the

objective of the 6,000 to 9,000 meter drill program is to collect information to develop an

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understanding of the volcanic architecture and alteration patterns at depth for a gold-rich massive

sulphide discovery or follow up exploration in 2018.

During the Exploration Period, we completed five drillholes for 4,869 meters testing the volcanic

rock assemblage over a 1.2-kilometer strike length. All of the drillholes encountered volcanic

rocks correlated to the assemblage present at surface and at Eskay Creek, and in two holes we

intersected sections of rhyolite, possibly representing the feeder footwall structures of the targeted

massive sulphide. Geophysical anomalies encountered from our borehole sur vey will be

prioritized for phase II exploration activities.

Next Steps

At the Marigold mine, o ur second half 2017 expl oration plan will shift toward the objective of

Mineral Resource expansion and discovery. T he deep sulphide program results at Marigold will

be analyzed to determine the best location for the next deep core hole.

At the Seabee Gold Operation, we expect to complete up to 60,000 meters of drilling under our

2017 underground exploration plan, with the objectives to upgrade existing Mineral Resources

and to discover additional Inferred Mineral Resources at Santoy Gap and Santoy 8. Our surface

drill programs at the Seabee Gold Operation are expected to complete approximately 28,500

meters on up to nine district targets. In the second half of 2017, we plan to continue drilling to

explore the lower sections of Santoy Gap, drilling the G ap HW area to establish an Inferred

Mineral Resource, and our deeper exploration program to expand and upgrade the lowermost 8A

Inferred Mineral Resources.

At the SIB project, we anticipate completing the phase I drill prog ram by the end of the third

quarter 2017 and will be compiling data through the fourth quarter 2017.

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Figure 1. Longitudinal section for the exploration drill program at the Santoy mine complex,

Seabee Gold Operation, Saskatchewan, Canada during the Exploration Period.

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Figure 2 . Property map of the Seabee Gold Operation and Fisher project, Saskatchewan,

Canada.

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Figure 3. Drillho le location plan map for the exploration drill programs at the Marigold mine,

Nevada, U.S. during the Exploration Period.

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Figure 4. Drill cross section along A -A’ highlighting the Mackay pit area at the Marigold mine,

Nevada, U.S.

Figure 5. Drill cross section along B-B’ highlighting the East Basalt area at the Marigold mine,

Nevada, U.S.