Guyana Goldstrike Sampling and Mapping of Trench TTR-18-10 Extended to 114 Metres at Toucan Ridge Area, Marudi Gold Project, Guyana

Trench TTR-18-10 is located approximately 400 metres eastward of trench TTR-18-06 along Toucan Ridge. To date, 114 metres has been trenched, sampled and mapped, with five sections identified as bearing quartzite-metachert host rock with magnetite. Trenching at TTR-18-10 continues.

Trenching began on the western end with trench TTR-18-05 which is located approximately one kilometre east of the Marudi North zone and one kilomtetre north of the Mazoa Hill zone.

The Mazoa Hill zone contains the project's current mineral resource estimate: 259,100 indicated gold ounces within 4,428,000 tonnes grading 1.8 g/t and 86,200 inferred gold ounces within 1,653,000 tonnes grading 1.6 g/t. Data analyzed suggests that the mineralized zone is open at depth and to the southeast.

Significant Gold Discoveries to Date

The Company has trenched four areas of interest: Paunch, Pancake, Marudi-North West Extension and Toucan Ridge, which is the current area of focus.

In May 2018, trench samples from the Paunch area returned the program's first significant gold discovery with high-grade assay results of 7.45 g/t and 5.98 g/t gold over 2 metres respectively.

(See news release dated May 15, 2018: "Guyana Goldstrike Assays up to 7.45 g/t in New Discovery of Gold Mineralization at Paunch Area, Marudi Gold Project, Guyana"; and,

News release dated May 30, 2018: "Guyana Goldstrike Continues with Gold Discovery: Assays up to 5.98 g/t Gold at Paunch Area, Marudi Gold Project, Guyana")

In July 2018, samples at Toucan Ridge returned the trenching program's second significant gold discovery with trench TTR-8-6 returning a total metallic weighted average assay of 1.27 g/t over 4.5 metres.

(See news release dated August 2, 2018: "Guyana Goldstrike Confirms Second Gold Discovery: Assays up to 1.53 g/t Gold in Trench TTR-18-6 at Toucan Ridge Area, Marudi Gold Project, Guyana")

In August 2018, samples at Toucan Ridge from trench TTR-18-8 returned initial assay values of 1.38 g/t gold over 16 metres including 5.4 g/t gold over 3 metres which has been subsequently adjusted to 1.22 g/t gold over 18.9 metres including 5.4 g/t over 3 metres.

(See news release dated August 14, 2018: "Guyana Goldstrike Reports Initial Assays of 1.38 g/t Gold Over 16 Metres Including 5.4 g/t Gold Over 3 Metres at Toucan Ridge Area, Marudi Gold Project, Guyana")

Table of Significant Gold Assays Results to Date

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Note: Interval lengths do not represent true widths.

Toucan Ridge Area Location and Trenching

A total of 1112 metres of trenching has been completed in the Toucan Ridge area. 390 samples have been taken. The exploration team will continue along the ridge progressing in an eastward direction with each new trench site stepping out roughly 50-100 metre intervals, mainly perpendicular to the ridge. The area of interest continues for more than 1.75 kilometres to the east of the first trench - TTR-18-05. 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.

TOUCAN RIDGE LOCATION MAP

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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.

Historical Trenching

Previous operators at Marudi reported 3,327.40 metres of trenching and assayed 1,069 samples with gold values assayed up to 11 g/t of gold. (Source: D. Strickland P. Geo NI 43-101 Technical Report, November 30, 2016)

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 sizeable gold production. They have a strong association between gold and iron sulfide 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, Lupin Mine, and Musselwhite Mine.

The Homestake Mine is located in South Dakota USA and 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 1878-2001. (Source: https://en.wikipedia.org/wiki/Homestake_Mine_(South_Dakota)

The Lupin Mine located in Nunavut, Canada, no longer in production, produced approximately 3 million ounces of gold. (Source: http://www.kinross.com/news-and-investors/news-releases/press-release-details/2003/Suspension-of-Operations-at-the-Lupin-Mine/default.aspx)

The Mussellwhite mine located in Ontario, Canada has estimated reserves of 2.29 million ounces of gold and is owned and operated by Goldcorp and will be in production until 2020. (Source: https://en.wikipedia.org/wiki/Musselwhite_mine)

Option Grant

The Company also announces that it will be proceeding with the grant of 1,500,000 incentive stock options announced on May 3rd, 2018, but that these options will be exercisable at a price of $0.30 and not $0.25 as previously noted. 150,000 of the options will vest in four equal increments every quarter for a period of 12 months, with the balance of the options vesting immediately. As announced, all the options will be exercisable for a period of sixty months.

About the Marudi Gold Project

The Company is developing the Marudi Gold Project located in Guyana, South America. The project has 18-year mining license in good standing, all-season road access, 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 has been 42,000 metres of historic diamond drilling (141 holes) completed on the project by prior operators that have delineated two zones of mineralization: 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 g/t and 86,200 inferred gold ounces within 1,653,000 tonnes grading 1.6 g/t. There exists excellent exploration upside through the development of previously and newly identified mineralized bedrock targets on the project.

For information concerning the mineral resource estimate and the project, readers are encouraged to review "Technical Report: Marudi Property Mazoa Hill Mineral Resource Estimate", a technical report prepared for the Company by Global Mineral Resource Services and is available at http://www.guyanagoldstrike.com/images/pdf/43101_Report_Guyana_Goldstrike_Mazoa_Hill_Zone_Jan_2018.pdf and under the Company's profile on SEDAR www.sedar.com.

Sampling and Assaying

All samples collected during this program were delivered to Activation Laboratories Ltd. (Actlabs) located in Georgetown, Guyana for gold content by Fire Assay (FA) and Total Metallics. Actlabs is ISO 17025 accredited and/or certified to 9001:2008. With 25+ years' experience, with full analytical laboratories that perform high quality analysis for many industries around the world.

Quality Assurance / Quality Control

Actlabs is an ISO 9001:2008 qualified assayer that performs and makes available internal assaying controls. Certified blanks and standards are systematically used as part of Guyana Goldstrike's quality assurance/quality control (QA/QC) program with one blank and standard inserted at every 20 sample intervals.

About Guyana Goldstrike Inc.

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

Please visit us at:

www.guyanagoldstrike.com

About Guyana

The Republic of Guyana is located in South America adjacent to Suriname. The country is English speaking and under British Common Law with a democratically-elected government. It has an established mining act and a rich history of gold production. In 2016, 690,000 ounces of gold was produced by operators mining in the country. The Fraser Institute's 2016 Annual Survey of Mining listed Guyana as the third best mining jurisdiction with regards to investment attractiveness in the Latin America and Caribbean Basin sub-group. The Guiana Shield is the geographic gold-hosting region, and is world-recognized as a premier gold region that is highly prospective, under-explored and has geological continuity with West Africa.* In 2016, two mines in Guyana declared the commencement of commercial production: the Aurora deposit (Guyana Goldfields) and the Karouni deposit (Troy Resources).

* Independent Technical and Environmental Review Karouni Gold Project - Guyana, Behre Dolbear Australia Pty Ltd, April 29, 2016

Qualified Person

Locke Goldsmith, M.Sc., P. Eng, P. Geo, 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.

On behalf of the Board of Directors of

Guyana Goldstrike Inc.

Peter Berdusco

President and Chief Executive Officer

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

This news release may contain certain "Forward-Looking Statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities laws. When used in this news release, the words "anticipate", "believe", "estimate", "expect", "target, "plan", "forecast", "may", "schedule" and other similar words or expressions identify forward-looking statements or information. These forward-looking statements or information may relate to future prices of commodities, accuracy of mineral or resource exploration activity, reserves or resources, regulatory or government requirements or approvals, the reliability of third party information, continued access to mineral properties or infrastructure, fluctuations in the market for gold, changes in exploration costs and government regulation in Guyana, status of artisanal mining activities and associated rights, and other factors or information. Such statements represent the Company's current views with respect to future events and are necessarily based upon a number of assumptions and estimates that, while considered reasonable by the Company, are inherently subject to significant business, economic, competitive, political and social risks, contingencies and uncertainties. Many factors, both known and unknown, could cause results, performance or achievements to be materially different from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements. The Company does not intend, and does not assume any obligation, to update these forward-looking statements or information to reflect changes in assumptions or changes in circumstances or any other events affections such statements and information other than as required by applicable laws, rules and regulations.

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