Mr. Nicholas Van Dyk reports

NORTHISLE ANNOUNCES DRILLING AT WEST GOODSPEED HAS INTERCEPTED PORPHYRY-RELATED COPPER MINERALIZATION OVER 800 METRE STRIKE

Drilling at NorthIsle Copper and Gold Inc.'s West Goodspeed target on the North Island project totalling over 3,077 metres has intercepted porphyry-related copper mineralization over an 800-metre strike length at West Goodspeed.

Assays have been received from the first completed 2024 hole (GS24-06), which intercepted porphyry-related copper and gold mineralization over approximately 200 metres, starting nine metres below surface, with significant intervals shown in the attached table. Porphyry-related alteration with chalcopyrite, as described further herein, has been visually observed in all drill holes completed during 2024 at the West Goodspeed target, with a systematic program of pXRF (portable X-ray fluorescence) scanning of core to confirm the presence of copper mineralization. Readers are cautioned that exploration results at West Goodspeed are preliminary and that visual and pXRF results provide no certainty that a deposit with reasonable prospects of economic extraction will be identified.

West Goodspeed drill result details

A total of seven drill holes totalling over 3,077 metres have now been completed in 2024 at West Goodspeed, with additional drilling continuing. This program was initially designed with approximately 3,600 metres planned to vector toward the source intrusion, with the goal of intercepting the potentially higher-grade potassic zone commonly found in similar porphyry systems. To date, all holes drilled in the West Goodspeed area have intersected visually observed copper mineralization as chalcopyrite/pyrite disseminated and in quartz and quartz-magnetite vein stockwork within quartz/sericite/pyrite and chlorite-magnetite alteration of Bonanza formation volcaniclastics, and feldspar porphyry and quartz-diorite intrusive rocks. The mineralization and alteration are consistent with that commonly found proximal to or within the potassic zone of a porphyry system. Porphyry-style mineralization has now been estimated to extend over a strike length of 800 metres, a dip length of approximately 300 metres and true width of 50 metres to 150 metres, with the volume remaining open along strike, up dip and downdip. The success of drilling to date has resulted in additional metreage being allocated to this target with the goal of further testing the extent of mineralization and to gain a better understanding of structural controls.

Robin Tolbert, vice-president, exploration, of NorthIsle, stated: "Initial returns from West Goodspeed are promising, with our team's 2024 exploration strategy demonstrating a high rate of success of intercepting mineralization. These results are preliminary, but we are encouraged by the drilling to date and look forward to receiving assays over the coming weeks."

Based on the positive initial results at West Goodspeed, NorthIsle has expanded the phase 1 program in this area with the goal of defining the lateral extent of the mineralization of this zone. In addition, the company will be staging drill pad construction crews and a second drill to site in the second half of July in order to commence drilling at the Northwest Expo target.

Utilizing reactivated forest service roads, NorthIsle is continuing drilling to determine the extent of mineralization at West Goodspeed first encountered in 2023 in GS23-04 and GS23-05 (see Dec. 6, 2023, press release). The subsequent drill holes through GS24-12 have all encountered porphyry-style copper mineralization related to quartz-sericite-pyrite (QSP) altered zones in diorite and feldspar porphyry intrusions, with copper mineralization occurring as disseminated and in stockwork quartz and quartz magnetite veinlets.

It is currently interpreted that the observed chlorite-magnetite alteration, interpreted to be altered from biotite/magnetite, is consistent with the potassic zone of a porphyry and has been in places overprinted by QSP alteration. The mineralized zone is bounded by two northeasterly dipping faults. Drilling will continue to determine the extent of the mineralized zone, which remains open downdip and to the northwest and southeast. Additional drilling will be carried out to determine the location of mineralization on the hangingwall and footwall of this postmineralization fault-bounded zone.

Subsequent to the commencement of the 2024 drill program and to provide additional detail for drill planning, NorthIsle retained Precision Geosurveys Inc. to complete a high-resolution airborne gradient magnetic survey on 100-metre-spaced lines covering an area from Northwest Expo to southeast of the Goodspeed target.

Coming catalysts

In 2024, the company will continue advancing the North Island project, with development and exploration catalysts throughout the year leading to measurable impacts for shareholders, including the following:

• Completed -- geophysics results from Northwest Expo and West Goodspeed;
• Completed -- Northwest Expo metallurgical testing and initial resource estimate;
• Completed -- final 2023 Pemberton Hills drill results;
• Completed -- commencement of 2024 drilling program;
• Completed -- preliminary project trade-offs;
• Completed -- commencement of advanced economic and technical studies;
• Completed -- initial drill results from West Goodspeed;
• Q3 2024 -- continued exploration results from 2024 phase 1 drilling program;
• Q3 2024 -- integrated North Island project mineral resource estimate update;
• Q4 2024 -- North Island project 2024 preliminary economic assessment;
• Second half of 2024 -- full results from 2024 phase 1 drilling program;
• Continuing -- continued positive engagement with indigenous rightsholders and local stakeholders.

Coming investor events

During 2024, the company will continue to be active in investor outreach. NorthIsle will be attending several external investor events, including the following events during Q3 and Q4 2024:

• Summer 2024 -- broker and institutional site visits;
• Sept. 10 to Sept. 13, 2024 -- Precious Metals Summit, Beaver Creek, Colo.;
• Sept. 15 to Sept. 18, 2024 -- Gold Forum Americas, Colorado Springs, Colo.;
• Nov. 20 to Nov. 21, 2024 -- Swiss Mining Institute, Zurich, Switzerland.

Additional technical details

Logging, sampling and assaying procedures and quality assurance/quality control

The diamond drill core logging and sampling program was carried out under a rigorous quality assurance/quality control (QA/QC) program using industry best practices. Drill intersections in this release are typically HQ to 100 metres and NQ thereafter to the end of the holes. After drilling, core was logged for geology, structure and geotechnical characteristics utilizing Geospark core logging software, then marked for sampling and photographed on site. The cores for analyses were marked for sampling based on geological intervals with individual samples three metres or less in length. Drill core was cut lengthwise in half with a core saw. Half-core was sent for assays reported in this news release. Prior to cutting core for assay, bulk density was also determined on site by taking 15-centimetre to 20-centimetre lengths of whole core of each lithology at 10-metre intervals. The ends of these were then cut at right angle to the core axis, retaining all pieces to be returned to the core box for later sample cutting and analysis. The diameter of each core sampled for bulk density was measured at each end with digital calipers to three decimal places and recorded. The length of the core was measured on four sides at 90 degrees to each other to two decimal places and recorded. The software averaged the lengths and diameters. The mass of the dry core was measured twice on an Ohaus balance to two decimal places. If no discrepancy occurred, the measurement was recorded. If there was a discrepancy, the measuring was repeated until no discrepancy between two measurements occurred. The density was calculated using the formula bulk density equals pi multiplied by r squared multiplied by h (where r is radius of core and h is length of core). Certified standard masses are used to calibrate the scale balance used for bulk density determinations. The balance in the core logging area was levelled on a large concrete block to avoid vibration was levelled and surrounded by a wooden partition to avoid wind affecting the balance. The measurements were recorded in Geospark logging software and bulk density was calculated to two decimal places.

A total of 5 per cent assay standards or blanks and 5 per cent core duplicates are included in the sample stream as a quality control measure and are reviewed after analyses are received. Standards were obtained from WCM Minerals of Vancouver, CDN Minerals of Langley and OREAS of Canada. Blanks were obtained from unmineralized coarse bagged limestone landscaping rock. Standards and blanks in 2023 drill results to date have been approved as acceptable. Duplicate data add to the long-term estimates of precision for assay data on the project and precision for drill results reported is deemed to be within acceptable levels. Samples were sent to MSALABS in Langley, B.C., where the samples were dried and then crushed and split; and a 250-gram split was pulverized to 85 per cent passing minus-200-mesh (minus-75-micrometre) size pulps. Clean crush material was passed through the crusher and clean silica was pulverized between each sample. The pulps were analyzed for gold by fire assay fusion of 50 grams of the 250-gram split. Total gold content was determined by digesting the silver dore bead from the fusion and then analyzing by AA (MSA Code FAS-121). All samples were also analyzed for multiple elements by taking 0.25 gram of the 250-gram split, which was heated in HNO3 (nitric acid), HClO4 (perchloric acid) and HF (hydrofluoric acid) to fuming and taken to dryness. The residue was dissolved in HCl (hydrochloric acid) and then analyzed utilizing ICP-MS (MSA Code IMS-230). Any sulphur analysis from this latter analysis with a value greater than 10 per cent was reanalyzed utilizing a Leco sulphur analyzer. Iron and tungsten accelerators are added to the sample and a stream of oxygen is passed over the sample in the induction furnace. As the sample is heated, sulphur dioxide released from the sample is measured by an IR (infrared) detection system and the total sulphur content is determined (MSA Code SPM-210). MSALABS (Langley) is an independent, international ISO/IEC 17025:2005 accredited laboratory.

Pulps and rejects of holes with significant assay intervals are stored at Western Mineral Storage. The remaining split core is indexed and stored at NorthIsle's logging and office facility in Port Hardy, B.C.

Drill results in this news release are length-weighted averages.

Qualified person and data verification

Robin Tolbert, PGeo, vice-president, exploration, of NorthIsle, and a qualified person as defined by National Instrument 43-101, Standards of Disclosure for Mineral Projects, has reviewed and approved the scientific and technical disclosure contained in this news release.

About NorthIsle Copper and Gold Inc.

NorthIsle is a Vancouver-based company whose mission is to become Canada's leading sustainable mineral resource company for the future. NorthIsle, through its 100-per-cent-owned subsidiary, North Island Mining Corp., owns the North Island project, which is one of the most promising copper and gold porphyry projects in Canada. The North Island project is located near Port Hardy, B.C., on a greater-than-34,000-hectare block of mineral titles 100 per cent owned by NorthIsle stretching 50 kilometres northwest from the now-closed Island copper mine operated by BHP Billiton. NorthIsle completed an updated preliminary economic assessment for the North Island project in 2021 and is now focused on continued advancement of the project while exploring within this highly prospective land package.

We seek Safe Harbor.