Mr. Adam Travis reports

COAST COPPER IDENTIFIES EXPANSION POTENTIAL AT RESOURCE STAGE MERRY WIDOW OPEN PIT, EMPIRE MINE, BC

Coast Copper Corp. has identified four exploration targets each with the potential to expand Coast Copper's recently announced National Instrument 43-101 mineral resource estimate (the 2023 MRE) for the gold-copper Merry Widow open pit located at its optioned Empire Mine property on northern Vancouver Island, B.C. (see May 23, 2023, news release).

The 2023 MRE for the Merry Widow open pit hosts an inferred resource of 81,322 ounces (oz) gold equivalent (AuEq) grading 3.52 grams per tonne (g/t) gold (Au) and 0.5 per cent copper (Cu) (4.258 g/t AuEq) within 590,000 metric tonnes, using a net smelter return (NSR) cut-off of $30. The 2023 MRE covers a 170-metre strike length to a depth of 130 m below surface. The Merry Widow resource is open along strike and down-dip, based on a review of the updated geological model, historical data review and the 2023 MRE. This updated information shows the potential to grow the resource footprint (in what has been defined as the upper zone).

The four drill target areas that could potentially expand the 2023 MRE are:

• Along strike to the north-northeast for at least 150 m to the Raven Bluff zone;
• To the south for at least 200 m to the Marten zone;
• At depth for at least 70 m based on geological mapping and sampling from the Kingfisher underground, as well as the geological observations noted while historically mining magnetite in the 1960s; and
• The footwall of the magnetite bodies as noted in 1989 drill holes and observed along the footwall of the current pit.

Adam Travis, Coast Copper chief executive officer, comments: "Our drilling, together with our updated geological models, have increased the grade of the Merry Widow resource into a 4.26 g/t gold-equivalent pit. Our team has been working on the potential expansion of the 2023 MRE, focusing on several zones proximal to the current resource. The updated Merry Widow MRE represents 175 m of the 500 m open strike length from Marten to Raven Bluff. This could potentially double or triple the 2023 MRE. The recent emphasis with regards to critical elements, including copper, has also been the impetus for the company to review potential credits for cobalt, silver and magnetite, which could add to the current copper and gold resource."

Two thousand twenty-three geological targets details:

1. The geological target on strike to the north-northeast has a volume which indicates potential to double the resource -- initial drilling by Coast Copper in the Raven Bluff area (approximately 150 m north-northeast of the Merry Widow pit) had drill hole MW21-16, which returned 7.18 g/t Au and 3.17 per cent Cu over 16.28 m.
2. South strike potential -- during the magnetite mining between 1962 and 1968, sulphide mineralization was observed south of the Merry Widow pit in an area noted as South Pit, toward the Marten zone. Mapping and sampling have identified a sulphide zone from the southern end of the Merry Widow pit with dimensions of 60 m by 25 m based on the surface mapping and sampling.
3. Hanging wall zone -- the 2008 historical resource was known to be open to depth and is reinforced with new, modern underground surveys, geological observations and sampling, which outline magnetite and massive sulphide mineralization within the Kingfisher underground. This area occurs from the base of the 2023 MRE to the Kingfisher underground, which is 50 m below and extending along strike for 100 m.
4. Footwall zone -- historical work from Taywin Resources between 1989 and 1991 has noted a zone of sulphide mineralization located in the back wall of the pit behind the magnetite workings. Although these drill holes were not used in the resource estimate due to lack of quality assurance/quality control (QA/QC) for the assay results, their geological observations combined with observations in the pit indicate a potential target zone.

Future work

As demand and awareness concerning critical minerals increases, Coast Copper has undertaken a review of secondary elements which could add to the value to the deposit. The company observed massive magnetite mineralization during its drill campaigns in 2021 and 2022, in and around the historical Merry Widow open pit. It is believed that magnetite could be included in an updated mineral resource estimate, especially given the fact that approximately 1.68 Mt (million tonnes) of iron concentrate was recovered from the property between 1957 and 1967, from both Merry Widow and Kingfisher open pits and underground. Lesser known and understood metals such as silver and cobalt (as noted in the company's drilling as well as historical drilling) could potentially also be added to an updated resource once metallurgical properties of these elements is better established.

Drill site locations are being examined by the company's technical team to determine the optimal targets and spacing to potentially increase tonnage, which would add to the current inferred resource. In addition to potentially updating the 2023 MRE, new drilling would also provide sample material for updated metallurgical studies.

Qualified persons

The technical information contained in this news release has been prepared, reviewed and approved by Wade Barnes, PGeo (B.C.), Coast Copper's geological consultant and a qualified person (QP) within the context of the Canadian Securities Administrators' National Instrument 43-101 -- Standards of Disclosure for Mineral Projects.

The 2023 MRE has been provided by Sue Bird, MSc, PEng, geological and mining engineer (NI 43-101 QP), of Moose Mountain Technical Services.

About Coast Copper Corp.

Coast Copper's exploration focus is the optioned Empire Mine property, located on northern Vancouver Island, B.C., which covers three historical open pit mines and two past-producing underground mines that yielded iron, copper, gold and silver. Coast Copper's other properties include its 100-per-cent-owned Knob Hill NW property located on northern Vancouver Island, its Home Brew property in central British Columbia, and its Scottie West property located in the Golden Triangle of Northern British Columbia. Coast Copper's management team continues to review precious and base metals opportunities in western North America.

We seek Safe Harbor.