Mr. Brian Fowler reports

NORTHSTAR SAMPLES HIGH-GRADE COPPER AT HISTORIC CAM COPPER MINE MILLER GOLD PROPERTY

Northstar Gold Corp. has released results of a recent surface sampling program at the historic Cam copper mine site on the company's 100-per-cent-owned, flagship Miller property, situated 18 kilometres southeast of the town of Kirkland Lake, Ont. The Cam copper mine is a road-accessible satellite high-grade copper system situated 2.4 km southwest of the Allied gold zone, the advanced, near-surface bulk-tonnage alkalic gold-telluride exploration target being actively explored by Northstar.

High-grade copper assays ranging between 0.99 per cent and 31.8 per cent copper were returned from 19 select surface grab samples containing massive to semi-massive sulphides (including massive chalcopyrite and bornite) and collectively weighing 43.39 kilograms, recently collected near the historic Cam copper mine site on the Miller property in Pacaud township. The weighted average grade of the 19 select samples collected from the historic muck pile and bedrock exposure near the historic shaft was 14 per cent copper.

In addition to high-grade copper, one select sample that assayed 31.8 per cent copper also returned 452 grams per tonne silver, suggesting silver can also be a significant mineralization component.

The Cam copper mine reportedly hosts two separate lenses (zone 1 and zone 2) of massive copper sulphides about 40 metres apart striking and plunging southeast along the contact with the Round Lake granite batholith. Underground development took place between 1929 and 1953 which includes sinking of a 220-foot (66.7-metre) vertical shaft with 213 feet (64.5 m) of crosscutting and 267 feet (80.9 m) of drifting. The recent surface sampling results verify historic reporting of a 1955 shipment of 346 tons of hoisted underground ore which produced 43,411 pounds of Cu at a Noranda smelter for a recovered grade of 6.3 per cent Cu. The ore was shipped directly from the mine site to the smelter without requiring further concentration in a mill. A previous 1948 shipment of 22 tons of ore to Noranda reportedly graded 12.72 per cent Cu, 0.84 ounce/ton Ag and 0.03 oz/t Au, presumably from zone 1.

Management commentary

"Northstar's limited Cam copper mine sampling program substantiates a high-grade critical minerals copper component to the spectrum of alkalic gold-telluride-copper zones at the Miller gold property," states Brian P. Fowler, PGeo, Northstar's president, chief executive officer and director. "Northstar is fully permitted to drill test the down-plunge extension of the Cam copper massive sulphide zones and, in addition to expansion drilling at the Allied gold zone, is formulating exploration plans targeting similar high-grade massive sulphide copper zones along strike southeast of the Cam copper mine site."

Northstar 2023 Cam copper surface exploration program

Northstar carried out a brief surface exploration program consisting of prospecting and sampling of Cam copper mine between May 19 and 25, 2023. A total of 19 representative surface samples were collected from the muck pile and bedrock surface near the historic shaft. Three samples were collected from a historic trench along the surface expression of zone 2. Assay results of the 19 samples ranged from 0.99 per cent to 31.8 per cent Cu, and 0.31 g/t Ag to 452 g/t Ag. Copper grades from the Cam copper muck pile and bedrock were consistent with historically reported grades from both drilling intercepts, underground sampling and former mine production data.

One muck sample (E455292) of massive chalcopyrite with bornite assayed 31.8 per cent Cu, 0.53 per cent zinc and 452 g/t Ag. A bedrock sample (E455309) collected from mineralized banded iron formation near the historic shaft assayed 13.65 per cent Cu.

Three samples collected from a trench representing the surface expression of zone 2 included one sample (E455315) that assayed 0.54 per cent Cu, indicating a possible extension of zone 2 toward the southeast of the old workings.

Follow-up work is required in the Cam copper area to fully investigate the down-plunge extension of the historic deposit.

Southeast extension -- geophysical targets

An iron formation hosting massive sulphides is known to extend for hundreds of metres along strike southeast of the Cam copper mine site. The trend includes multiple ground electromagnetic and induced polarization targets along with strong airborne EM and magnetic anomalies.

Future plans

Northstar will undertake a ground truthing and sampling program of surficial geophysical anomalies along strike to the southeast of the Cam copper mine searching for analogous targets that could potentially host massive copper sulphides.

Follow-up drilling is now being planned to test the down-plunge extension of the bornite-rich pods of massive sulphide in zones 1 and 2.

The historic Cam copper mine

The Cam copper mine reportedly hosts two separate lenses (zone 1 and zone 2) of massive copper sulphides about 40 metres apart striking and plunging southeast along the contact with the Round Lake granite batholith. Laminated sulphides hosted in tuff with lower-grade copper values are reported to occur on either side of the massive copper sulphide bands. The copper mineralization is focused along the steeply plunging intersection of northeast-striking silicified tectonic breccias with southeast-striking, vertically dipping bands of silicious sulphide facies iron formation within felsic and mafic tuffaceous units. The copper zones remain open down plunge to the southeast. The former-producing Amity and Patterson copper mines occur within the same geologic formation along strike to the northwest.

Underground development and historic production

Underground development took place between 1929 and 1953 which includes sinking of a 220-foot (66.7 m) vertical shaft with 213 feet (64.5 m) of crosscutting and 267 feet (80.9 m) of drifting. The recent surface sampling results verify historic reporting of a 1955 shipment of 346 tons of hoisted underground ore which produced 43,411 lb of Cu at a Noranda smelter for a recovered grade of 6.3 per cent copper. The ore was shipped directly from the mine site to the smelter without requiring further concentration in a mill. A previous 1948 shipment of 22 tons of ore to Noranda reportedly graded 12.72 per cent Cu, 0.84 oz/t Ag and 0.03 oz/t Au, presumably from zone 1.

Historic drilling

Historic drilling intercepts in zone 1 by Consolidated Golden Arrow Mines Ltd. at the Cam copper mine include:

• 1.6 per cent Cu over 6.6 ft (two m) in DDH 1;
• 9.8 per cent Cu over four ft (1.21 m) in DDH 1A;
• 12.4 per cent Cu over 7.8 ft (2.36 m) in DDH 3;
• 7.0 per cent Cu over six ft (1.82 m) in DDH 4.

Average sampling grade reported in zone 1 was 8.5 per cent Cu over a true width of 4.4 ft (1.33 m) indicated over 100 ft (30.3 m) along strike.

Historic drilling intercepts by Consolidated Golden Arrow Mines in zone 2 include:

• 310.5 per cent Cu over 0.5 ft (0.15 m) in DDH 2;
• 19.9 per cent Cu over 3.1 ft (0.94 m) in DDH 3;
• 23.1 per cent Cu over 4.6 ft (1.39 m) in DDH 4; down-plunge extension below workings;
• 12.4 per cent Cu over 3.3 ft (one m) in DDH 7; down-plunge extension below workings.

Average sampling grade reported in zone 2 was 10 per cent Cu over a true width of 2.8 ft (0.85 m) indicated over 140 ft (42.4 m) along strike.

Bornite was reported to be common in zone 2 with the bornite-rich pods of massive sulphides remaining open down plunge to the southeast.

Quality control

Samples collected in the 2023 Miller surface exploration program were delivered to ALS Global in Timmins, Ont., for preparation and assayed for gold by ALS Global in Vancouver, B.C.

Northstar has implemented a quality control program for the Cam copper mine to ensure best practice in the sampling and analysis of surface samples, which includes the insertion of blanks and certified standards into the sample stream.

Surface samples were submitted to ALS Global at its Timmins, Ont., facility for sample preparation where the entire sample was crushed to better than 90 per cent passing two millimetres, 1,000-gram riffle split and pulverized to 85 per cent passing 75 microns. Pulps are forwarded to ALS Global in Vancouver, B.C., for analyses. Gold analyses is obtained by industry-standard fire assay with inductively coupled plasma finish using 15 g to 30 g aliquots. For samples returning greater than 10 g/t gold follow-up fire assay analysis with a gravimetric finish is completed. Based on initial fire assay gold indications as well as visual indication of mineralization and alteration, samples are selected for reassay by the screen metallic fire assay method. Samples are also analyzed for 48 trace and major elements by inductively coupled plasma mass spectrometry following a four-acid digestion. For samples returning greater than 10,000 parts per million Cu, follow-up four-acid digestion and ICP finish utilizing a 0.4 g sample is utilized. ALS Global is ISO/IEC 17025:2017 accredited (lab No. 579) for the preparation and analyses performed on the Milestone samples.

Qualified person

Mr. Fowler, PGeo, a qualified person as defined under Canadian National Instrument 43-101, has reviewed technical aspects of this news release.

About the Miller property

Northstar's flagship property is the 100-per-cent-owned Miller gold property, situated 18 kilometres southeast of Kirkland Lake and Agnico Eagle Mines' Macassa SMC gold mine. The Miller gold property is highly prospective for the discovery of a large-scale, higher-grade gold system similar to the deposits of the Kirkland Lake camps that produced over 24 million ounces of gold from seven mines. Geologically, Miller is believed to be a close analogue to Agnico Eagle Mines' Macassa SMC gold mine, given the numerous geological similarities. Both Miller and the newly discovered lower SMC at Macassa share the similar formation, age and mineralization style (gold-telluride vein system with calaverite the main gold mineral). Both deposits are also located next to a first-order fault structure (Catharine fault zone at Miller property and the Larder break at Kirkland Lake) potentially sharing a gold-enriched magmatic reservoir at depth.

The Kirkland district is being explored by major and junior gold companies alike with some significant consolidation transactions recently announced and completed. Since going public by initial public offering in late 2020, Northstar has spent over $4.7-million in exploration at Miller, resulting in the discovery of a series of broad, near-surface, shallow-dipping sheeted quartz-gold-telluride vein structures in the Allied syenite (Allied gold zone) and Planet syenites and numerous 70 to 750 gold gram/metre drill hole intercepts. Drilling to date at the AGZ has returned near-surface gold intercepts that include 6.6 g/t Au over 117 metres, four g/t Au over 50.6 metres, 1.4 g/t Au over 118.5 metres and 1.2 g/t Au over 107.3 metres. Stepout AGZ drilling in 2021 intersected peripheral steeply dipping copper-gold bearing structures (CG1 and CG2 zones) returning intercepts that include 9.41 g/t Au and 1.03 per cent Cu over three m. The AGZ shares numerous compelling similarities to Agnico Eagle's nearby Upper Beaver deposit, currently in the predevelopment stage.

In April, 2022, as a precursor to a mineral resource estimate and for reporting purposes, the company commissioned Ronacher Mackenzie Geoscience and SRK Consulting (Canada) to conduct an exploration target study of the Miller property Allied gold zone and No. 1 vein. An upper range exceeding 500,000 ounces of gold averaging 2.04 g/t Au has been referenced in this study. Results were reported July 26, 2022, verifying the significance, size and gold grade potential of the Allied gold mineralizing system. Results provide the company and investors a fact-based conceptual tonnage and gold grade range for the Allied syenite gold zone, and basis for continued expansion drilling and mineral resource development.

In April, 2023, Northstar reported results of a high-resolution UAV (unmanned aerial vehicle) airborne magnetic survey completed over the Miller gold property that identified a volumetrically large positive magnetic anomaly (SM-01) partially underplating the near-surface Allied gold zone and syenite stock. The SM-01 anomaly displays a high magnetic susceptibility signature, possibly reflecting a deeper large, discrete mafic intrusion and source area for higher, recently discovered, steeply dipping Au-Cu sulphide mineralization discovered in 2021 drill holes MG21-64 (4.71 g/t Au, 0.51 per cent Cu over 6.4 m -- CG1 zone) and MG21-65 (9.41 g/t Au, 1.03 per cent Cu over three m -- CG2 zone). Eleven additional anomalies consistent with possible syenite intrusions have also been identified.

Northstar is positioning to conduct a phase IIIA Allied gold zone lateral and depth expansion drill program on the Miller gold property.

About Northstar Gold Corp.

Northstar's primary exploration focus is the advancement of the company's flagship, 100-per-cent-owned Miller gold property, situated 18 km southeast of Kirkland Lake and Agnico Eagle Mine's Macassa SMC gold mine. The company's strategy is to develop either a minimum material (over one million ounces) high-grade gold mineral resource to potentially supplement a nearby mining operation or a stand-alone mining operation at the Miller gold property.

We seek Safe Harbor.