Mr. Peter Berdusco reports

GUYANA GOLDSTRIKE CONTINUES TO ENCOUNTER HOST ROCK: MAPS AND SAMPLES 479.50 METRES AT TRENCHES TTR-18-10 AND TTR-18-11, TOUCAN RIDGE, MARUDI GOLD PROJECT, GUYANA

Guyana Goldstrike Inc. has completed sampling and mapping of trenches TTR-18-10 and TTR-18-11 at the Toucan Ridge area on its Marudi gold project located in the Guiana gold belt in Guyana, South America.

Trench TTR-18-10, which is located 400 metres east of trench TTR-18-06 along Toucan Ridge, was trenched a total length of 354.50 metres with 134 samples taken. The technical team successfully encountered and sampled intervals of quartzite-metachert host rock.

Trench TTR-18-11, which is 500 metres northeast of trench TTR-18-06 along Toucan Ridge, was oriented to cross an outcrop of quartzite-metachert. A total length of 125 metres was trenched and 50 samples were taken. The quartzite-metachert was again successfully encountered and two significant intervals measuring 22.60 metres and 23.80 metres were exposed.

All assays have been sent to Actlabs and results will be released once received and reviewed by the company. The technical team continues to trench along the Toucan Ridge area moving in an eastward direction.

Current trenching at Toucan Ridge -- 1.75-kilometre area of interest

A total of 1,748 metres of trenching have been completed in the Toucan Ridge area to the end of TTR-18-11 and 518 samples have been taken. The exploration team will continue along the ridge, progressing in an eastward direction, with each new trench site stepping out mainly perpendicular to the ridge. The area of interest continues for more than 1.75 kilometres to the east of trench TTR-18-06. Trench sites are planned where quartzite-metachert is exposed or interpreted to occur beneath the transported overburden. The eastern part of Toucan Ridge is approximately 400 metres south of the Paunch area, which was trenched in May and returned the company's first significant gold discovery.

Current gold zones and mineral resource estimate at Marudi

The Toucan Ridge area is located approximately one kilometre east of the Marudi North zone and one kilometre north of the Mazoa Hill zone. The Mazoa Hill zone contains the project's current mineral resource estimate. Data analyzed suggest that the mineralized zone is open at depth and to the southeast.

Mazoa Hill zone mineral resource estimate:

• 259,100 indicated gold ounces within 4,428,000 tonnes grading 1.8 grams per tonne;
• 86,200 inferred gold ounces within 1,653,000 tonnes grading 1.6 grams per tonne.

Toucan Hill -- diamond drill hole TH 93-84

One historical hole has been drilled near Toucan Ridge. In 1993, Romanex-Sutton drilled 300 metres south of the ridge at the Toucan Hill area. The hole encountered a 39-metre section of elevated mineralization, including three metres of 0.82 gram per tonne gold at a depth of roughly 180 metres below surface. The hole terminated at a depth of 230 metres below surface in the quartzite-metachert host rock without drilling through it.

About quartzite-metachert (host rock) at Marudi

At Marudi, all important gold mineralization discovered to date is associated with the medial quartzite-metachert (host rock) unit of the Marudi Mountain formation. Gold occurs within the magnetite-hematite-rich quartzite and in the magnetite-silicate iron formation. Mineralization of the host rock may be affected at surface by the erosion at different levels of the strata. Therefore, all discoveries of quartzite-metachert on the property are considered important for the potential of containing mineralization at surface and/or at depth and should be explored through trenching and drilling. When discovered, these areas are assigned high levels of priority for further exploration work, including drilling in the company's planned drill program.

Marudi geology

Gold mineralization at Marudi is regarded as being related to iron-formation-hosted gold (IFG) deposits that occur in other cratonic greenstone belts around the world. These deposits can be remarkably long lived with sizable gold production. They have a strong association between gold and iron sulphide minerals, the presence of gold-bearing quartz veins and structures, the occurrence of deposits in structurally complex terranes, and the absence of lead and zinc enrichment.

Examples of some existing IFG deposits are the Homestake mine, the Lupin mine and the Musselwhite mine.

The Homestake mine, located in South Dakota, United States, was the largest and deepest gold mine in North America. It has reported production of 43.9 million ounces of gold and was in production from 1878 to 2001.

The Lupin mine, located in Nunavut, Canada, which is no longer in production, produced approximately three million ounces of gold.

The Musselwhite mine, located in Ontario, Canada, has estimated reserves of 2.29 million ounces of gold; is owned and operated by Goldcorp; and will be in production until 2020.

About the Marudi gold project

The company is developing the Marudi gold project located in Guyana, South America. The project has an 18-year mining licence in good standing, all-season road access as well as infrastructure in place, with an established camp serviced by employees, service buildings and a full-time camp manager. The property has three known gold-bearing areas: the alluvial areas, the saprolite and the underlying hard rock.

There have been 42,000 metres of historical diamond drilling (141 holes) completed on the project by prior operators that have delineated two zones of mineralization: the Mazoa Hill and Marudi North zones. The company has recently completed a mineral resource estimate on the Mazoa Hill zone containing 259,100 indicated gold ounces within 4,428,000 tonnes grading 1.8 grams per tonne and 86,200 inferred gold ounces within 1,653,000 tonnes grading 1.6 grams per tonne. The company has recently discovered a third mineralized zone: Toucan Ridge. This zone is the current focus of the company's 2018 trenching program.

There exists excellent exploration upside for the further discovery of mineralized zones through the development of previously and newly identified mineralized bedrock targets on the project.

Sampling and assaying

All samples collected during the trenching program were delivered by Guyana Goldstrike staff to Activation Laboratories Ltd. (Actlabs), located in Georgetown, Guyana. Actlabs is ISO 17025 accredited and an ISO 9001:2008-qualified and -certified assayer that performs and makes available internal assaying controls. Actlabs has more than 25 years of experience and maintains complete analytical laboratories that perform high-quality analysis for many industries around the world.

Two samples are collected from each interval in the trenches. The first sample is sent to Actlabs to be assayed either by fire assay for gold, or for gold by total metallic content, to account for free gold and nugget effect. The second sample is panned to determine if visible gold may be present; a count of gold points and dust is recorded.

All samples that are identified by the project geologist as quartzite-metachert (the typical host rock for gold mineralization at Marudi) are routinely sent to Actlabs for total metallic content. Sample intervals of any rock type that contain visible gold in panning are also assayed by total metallics.

Quality assurance/quality control

Certified blanks and standards are systematically used in the trenching program as part of Guyana Goldstrike's quality assurance/quality control program. One blank and one standard are inserted into sample shipments at every 20th sample. Duplicates are also inserted into sample shipments.

About Guyana Goldstrike Inc.

Guyana Goldstrike is a Canadian-based junior gold company focused on the exploration, development and operation of the Marudi gold project in Guyana, South America.

Qualified person

Locke Goldsmith, MSc, PEng, PGeo, chief geologist and exploration manager for the company, is a qualified person in accordance with National Instrument 43-101, Standards of Disclosure for Mineral Projects. Mr. Goldsmith has reviewed and approved the scientific and technical content of this news release.

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