Mr. Charles Funk reports

HELIOSTAR DRILLS 31.8 G/T GOLD OVER 9.5 METRES WITHIN 8.0 G/T GOLD OVER 72.0 METRES IN UP-PLUNGE TARGET AT THE ANA PAULA PROJECT

Heliostar Metals Ltd. has released additional drill results from the Ana Paula project in Mexico. These four holes continue to assess mineralization up plunge of the high-grade panel at the core of Ana Paula.

Heliostar chief executive officer Charles Funk commented: "Drilling at Ana Paula continues to exceed our expectations and deliver impressive gold intercepts. The headline hole, AP-23-300, is a 480-per-cent increase to the current resource model prediction, at a greater-than-five-gram-per-tonne-gold cut-off grade. The most easterly of Heliostar's holes, AP-23-302, was also particularly impactful with an intersection of 51 metres at 5.0 g/t gold in an area where high gold grades were not modelled in the 2023 PFS [prefeasibility study] resource. These results validate our belief that we can meaningfully increase the value of the Ana Paula project. The company continues its well-funded expansion and infill drilling program of the high-grade panel. Additional drill results will continue to be announced ahead of the planned resource update in November, 2023."

Drill results

Results from this press release are from Heliostar's up-plunge growth target at Ana Paula.

Hole AP-23-299 tested the up-dip and central portions of the high-grade panel. This hole extended mineralization toward the surface and returned 38.0 metres grading 6.95 g/t gold, including 11.0 metres grading 15.8 g/t gold.

Hole AP-23-300 tested a gap in the high-grade, up-plunge area where hole AP-23-297 had intersected a subinterval of 24 metres at 8.8 g/t gold. Hole AP-23-300 returned 38 metres grading 13.4 g/t gold, including 9.5 metres grading 31.8 g/t gold, to better define the northern extent of the high-grade panel in this area.

Hole AP-23-301 tested deeper beneath AP-23-300 in an area where the panel is narrower. It intersected 8.5 metres grading 3.0 g/t gold.

Hole AP-23-302 tested a gap in the high-grade mineralization at the far east of the high-grade panel in an area where no high-grade mineralization was modelled in the resource. It returned a strong intercept of 51.8 metres grading 5.01 g/t gold, including 4.7 metres grading 11.6 g/t gold. This is particularly impactful, as it has the potential to infill a large gap in the panel with gold mineralization.

Drill results impact

The potential impact of the drill results on future resource models can be demonstrated by comparing the current results with the existing model (as reported in the 2023 prefeasibility study). Drilling that outperforms (i.e., is higher grade or wider than) the model may be expected to improve the grade and size of future resource and reserve estimates. Using a five g/t cut-off grade provides a useful benchmark to the most financially impactful ounces in an underground mining scenario.

At a five g/t cut-off, hole AP-23-299 has an 83-per-cent increase when compared with an expected intercept calculated from the existing resource model. Using the same criteria: AP-23-300 has a 480-per-cent increase compared with the expected intercept from the resource model; AP-23-301 has a 63-per-cent decrease compared with the expected intercept from the resource model; and AP-23-302 was a significant increase, as no high grade was estimated in the resource model.

Drilling progress

The company is on schedule and on budget with the drilling program. The company completed 18 holes at Ana Paula. The company has reported results from 12 holes to date. Holes AP-23-302 through and AP-23-305 are the company's first holes targeting high-grade mineralization farther west into the down-plunge target. The holes intersected sulphide mineralization throughout, particularly AP-23-303.

The company is finishing two infill holes in the vicinity of hole AP-23-291. The result will be a cross-section of tightly spaced intercepts, and these holes will support resource modelling and provide metallurgical material for analysis.

Quality assurance/quality control

Core samples were shipped to ALS Ltd. in Santiago de Queretaro, Mexico, for sample preparation, and for analysis at ALS in North Vancouver. The North Vancouver ALS facility is ISO/IEC 17025 certified. Gold was assayed by 30-gram fire assay with atomic absorption spectroscopy finish, and overlimits were analyzed by 50 g fire assay with gravimetric finish.

Control samples comprising certified reference samples and blank samples were systematically inserted into the sample stream and analyzed as part of the company's quality assurance/quality control protocol.

Statement of qualified person

Stewart Harris, PGeo, a qualified person, as such term is defined by National Instrument 43-101 -- Standards of Disclosure for Mineral Projects, has reviewed the scientific and technical information that forms the basis for this news release and has approved the disclosure herein.

Investor relations

The company entered into a marketing services arrangement with Robert Sinn on May 5, 2023, pursuant to which Mr. Sinn has agreed to provide certain investor relations services to the company over a 12-month period for a total fee of $25,000 (U.S.), which was paid upfront. The services to be provided include featured articles and videos on the company and coverage of news flow on social media. Mr. Sinn is at arm's length to the company, and neither holds any securities of the company nor has any interest, direct or indirect, in the company.

Mr. Sinn is a trader, portfolio manager and analyst in capital markets. Mr. Sinn studied finance and real estate at university and has been blogging about the stock market, precious metals and mining for over a decade. Mr. Sinn is based in Florida, United States.

About Heliostar Metals Ltd.

Heliostar is a junior mining company with a portfolio of high-grade gold projects in Mexico and Alaska.

The company is focused on developing the 100-per-cent-owned Ana Paula project in Guerrero, Mexico. In addition, Heliostar is working with the Mexican federal and local governments to permit the San Antonio gold project in Baja Sur, Mexico. The company continues efforts to explore the Unga gold project in Alaska, United States.

The Ana Paula project deposit contains proven and probable mineral reserves of 1,081,000 ounces of gold (630,000 proven and 451,000 probable ounces) at 2.38 grams per tonne gold and 2,547,000 ounces of silver (1,322,000 proven and 1,226,000 probable ounces) at 5.61 g/t silver. Ana Paula hosts measured and indicated resources of 1,468,800 ounces of gold (703,800 measured and 765,000 indicated ounces) at 2.16 g/t gold and 3.6 million ounces of silver (1,637,000 measured and 1,963,000 indicated ounces) at 5.3 g/t silver. The asset is permitted for open-pit mining and contains significant existing infrastructure, including a portal and a 412-metre-long decline.

We seek Safe Harbor.