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TriStar Gold Strengthens Case and Provides Corporate Update for Castelo De Sonhos Gold Project

Corporate Updates

TriStar Gold Strengthens Case and Provides

Corporate Update for Castelo De Sonhos Gold

Project

Scottsdale, Arizona--(Newsfile Corp. - September 26, 2025) -

TriStar Gold Inc.

(TSXV: TSG)

(OTCQB: TSGZF)

(the "Company" or "TriStar") is pleased to provide an update on activities related to

the Castelo de Sonhos project, in Pará State, Brazil.

TriStar and State Environmental Secretariat of

Pará ("SEMAS"), the primary regulator, have both now filed their responses to the August 6, 2025,

announced civil public action from the Federal Prosecutor's Office ("MPF") defending the environmental

licensing process that has been undertaken at the Castelo de Sonhos project. While this action is

ongoing, the Licença Prévia (Preliminary License or LP) for Castelo de Sonhos remains in place, with

no restrictions.

TriStar will participate in a webinar on Tuesday, September 30

th

at 2pm ET. Registration details below.

Nick Appleyard, TriStar's President and CEO stated: "The strength of our legal case and the support of

SEMAS gives us confidence that we will prevail.

The strength of our case is a testament to the high

quality of technical and environmental study work that was completed during permitting and all our time

and efforts as custodians of this special project.

Future drilling will remain in the planning stages while

clarity is sought on the legal challenge and project permitting is advanced."

Legal Responses to Public Civil Action – Castelo de Sonhos Project

The summaries below reflect the central legal positions advanced by both the State of Pará and TriStar,

highlighting that the project remains in an early licensing phase, with further assessments to be

conducted before any construction or operation begins.

State of Pará's Response

The State, through SEMAS, has requested denial of the court injunction, dismissal of the MPF claims,

and proposes judicial expert evidence to confirm the project's compliance and lack of impact on

Indigenous territories. The State of Pará has defended the legality and technical soundness of the

environmental licensing process challenged by the Federal Public Prosecutor's Office (MPF), which

seeks to suspend the project's Preliminary License (LP No. 2016/2024). The State argues that:

1

.

Licensing Process Compliance: The LP was issued following all legal and technical requirements,

including a robust Environmental Impact Assessment (EIA/RIMA) aligned with CONAMA

Resolution No. 01/1986 and approved by the State Environmental Council (COEMA).

2

.

Scope of LP: The LP only establishes locational feasibility and does not authorize construction or

operations; further assessments (e.g., dam safety, hydrological studies) are scheduled for later

phases (Construction License LI/Operating License (LO)).

3

.

No Impact on Indigenous Lands: Baú and Menkragnoti Indigenous Lands are over 10 km from the

project's Directly Affected Area, exceeding the threshold in Interministerial Ordinance No. 60/2015.

No hydrological, ecological, or socioeconomic links justify Indigenous consultation at this stage.

4

.

No Basis for Injunction: The request for urgent relief lacks legal and factual justification. There is no

demonstrated harm or urgency.

5

.

Respect for Technical Authority: SEMAS, the licensing agency, has jurisdiction and expertise.

MPF's unilateral reports cannot override the participatory and transparent administrative process.

6

.

Preservation of Legal Certainty: Suspending the LP would create legal instability without

environmental benefit. Any necessary adjustments should occur during later licensing phases.

TriStar's Response

TriStar also rejects the Prosecutor's claims, defending the integrity of the licensing process and

EIA/RIMA. Key arguments include:

1

.

EIA/RIMA Adequacy: Prepared by independent experts, reviewed over two years by SEMAS, and

unanimously approved by COEMA. The study correctly defined areas of influence based on

technical criteria.

2

.

No Indigenous Impact: Hydrological and socioeconomic studies confirm no link or impact on

Indigenous lands, which lie beyond the 10 km thresholds.

3

.

Tailings Facility Safety: Designed with a downstream method. Emergency and residue

management plans are legally due at the LI phase, not at LP.

4

.

Water & Air Impact: Hydrological studies show strictly local and minor effects, with no mercury use

and advanced treatment systems in place. Air emissions will be addressed in the LI stage.

5

.

Cultural & Archaeological Findings: Surveys found no overlap with Indigenous cultural areas. Minor

pre-colonial remains within the project site will be rescued under IPHAN oversight.

6

.

No Urgency; Reverse Risks: There's no imminent threat warranting injunctive relief. On the contrary,

suspending the LP would harm ongoing compliance, social and environmental programs,

employment (1,600+ jobs), and future tax revenues critical to the State of Pará's development.

Webinar Registration

The Company will participate in a webinar on September 30, 2025, at 2:00 PM ET hosted by Adelaide

Capital. Questions can be submitted during the session or in advance to

[email protected]

.

Registration link:

https://us02web.zoom.us/webinar/register/WN_aCX0WJtZSu-A7fSOgOCUzQ

A replay will be made available on the Adelaide Capital YouTube channel here:

https://www.youtube.com/channel/UC7Jpt_DWjF1qSCzfKlpLMWw

.

About TriStar

TriStar Gold is an exploration and development company focused on precious metals properties in the

Americas that have the potential to become significant producing mines. The Company's current flagship

property is Castelo de Sonhos in Pará State, Brazil. The Company's shares trade on the TSX Venture

Exchange under the symbol

TSG

and on the OTCQB under the symbol

TSGZF

. Further information is

available at

www.tristargold.com

.

On behalf of the board of directors of the company:

Nick Appleyard

President and CEO

For further information, please contact:

TriStar Gold Inc.

Nick Appleyard

President and CEO

480-794-1244

[email protected]

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. No stock exchange, securities commission or other regulatory authority has approved or

disapproved the information contained herein.

Forward-Looking Statements

Certain statements contained in this press release may constitute forward-looking statements under

Canadian securities legislation which are not historical facts and are made pursuant to the "safe

harbour" provisions under the United States Private Securities Litigation Reform Act of 1995.

Generally, forward-looking information can be identified by the use of forward-looking terminology

such as "expects" or "it is expected", or variations of such words and phrases or statements that

certain actions, events or results "will" occur. Forward looking statements in this press release include,

the Company's expectations regarding the outcome of the Civil Public Action referenced above, as

well as the related injunction application. Readers are cautioned that such forward-looking statements

involve known and unknown risks, uncertainties and other factors that may cause a change in such

assumptions and the actual outcomes and estimates to be materially different from those estimated

or anticipated future results, achievements or position expressed or implied by those forward-looking

statements. Risks, uncertainties and other factors that could cause the Company's plans to change

include the ongoing litigation process, and legislative, political or economic developments in Brazil.

Although management of the Company has attempted to identify important factors that could cause

actual results to differ materially from those contained in forward-looking statements or forward-looking

information, there may be other factors that cause results not to be as anticipated, estimated or

intended. The Company disclaims any intention or obligation to update or revise any forward-looking

statements whether as a result of new information, future events or otherwise, except as required by

applicable securities laws.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/268023