Mr. Darren Hall reports

CALIBRE INTERCEPTS HIGH-GRADE GOLD BELOW THE JABALI MINE AND RESOURCE AND IDENTIFIES THREE ADDITIONAL GOLD TARGETS ALL WITHIN 10 KM OF THE LIBERTAD MILL; INITIAL JABALI RESULTS INCLUDE 10.80 G/T GOLD OVER 14.3 METRES AND 8.44 G/T GOLD OVER 8.9 MET

Calibre Mining Corp. has released a series of drill results from its 2023 resource expansion drill program within the Libertad mine complex. High-grade gold from underground drilling, approximately 100 metres below the main Jabali resource, confirms mineralization and continuity down-dip with strong potential for resource expansion. Additionally, scout level drilling across the property has identified three new target areas located within 10 kilometres of the Libertad mill. First pass results demonstrate the potential for additional, near surface gold resources.

Highlights at the Jabali underground mine include:

10.80 g/t Au over 14.3 metres estimated true width including 26.72 g/t Au over 4.5 metres ETW in hole JB-23-538A;  

18.84 g/t Au over 3.1 metres ETW including 31.30 g/t Au over 1.8 metres ETW in hole JB-23-539;  

4.51 g/t Au over 3.1 metres ETW including 9.04 g/t Au over 1.5 metres ETW in hole JB-23-540;  

8.44 g/t Au over 8.9 metres ETW including 22.08 g/t Au over 3.0 metres ETW in hole JB-23-541.  

Darren Hall, president and chief executive officer of Calibre, stated: "It's exciting to see high-grade gold mineralization intercepted close to the existing underground development, signalling potential expansion of the Jabali underground mine. Mineral resource grades at Jabali average four g/t gold; with higher grades indicating the potential for significant upside at depth where the deposit remains open for expansion. Initial drill results, along the same trend as the recently announced Volcan open pit resource, demonstrate strong potential to expand resources and discover new zones. As a result, several high-grade areas at the Calvario, Salvadorita, Mestiza vein systems are scheduled for immediate follow-up."

Highlights from the scout level drill program include:

14.39 g/t Au over 2.3 metres ETW including 48.91 g/t Au over 1.2 metres ETW in hole CV-23-022;  

32.84 g/t Au over 2.1 metres ETW in hole CV-23-032;  

17.40 g/t Au over 1.2 metres ETW in hole CV-23-023;  

156.7 g/t Au over 0.44-metre ETW in hole SAL-23-004;  

9.65 g/t Au over 2.1 metres ETW including 20.00 g/t Au over 0.8-metre ETW in hole VN-23-137;  

4.22 g/t Au over 1.8 metres ETW including 8.00 g/t Au over 1.0-metre ETW in hole SAL-23-009;  

4.08 g/t Au over 1.4 metres ETW in hole CV-23-030;  

2.29 g/t Au over 3.0 metres ETW including 4.73 g/t Au over 1.4 metres ETW and 2.73 g/t Au over 4.2 metres ETW including 7.40 g/t Au over 1.0-metre ETW in hole MZ-23-023;  

6.88 g/t Au over 2.1 metres ETW and 1.69 g/t Au over 1.5 metres ETW in hole MZ-23-02;  

52.00 g/t Au over 6.9 metres ETW including 6.15 g/t Au over 1.8 metres in hole VN-23-142.  

Quality assurance/quality control

Calibre maintains a quality assurance/quality control program for all its exploration projects using industry best practices. Key elements of the QA/QC program include verifiable chain of custody for samples, regular insertion of certified reference standards and blanks, and duplicate check assays. Drill core is halved and shipped in sealed bags to Bureau Veritas in Managua, Nicaragua, an independent analytical services provider with global certifications for Quality Management Systems ISO 9001:2008, Environmental Management: ISO14001 and Safety Management OH SAS 18001 and AS4801. Prior to analysis, samples are prepared at Veritas's Managua facility and then shipped to its analytical facility in Vancouver, Canada. Gold analyses are routinely performed via fire assay/AA finish methods. For greater precision of high-grade material, samples assaying 10 g/t Au or higher are reassayed by fire assay with gravimetric finish. Analyses for silver and other elements of interest are performed via induction coupled plasma (ICP).

Qualified person

The scientific and technical information contained in this news release was approved by David Schonfeldt, PGeo, Calibre Mining's corporate chief geologist and a qualified person under National Instrument 43-101.

About Calibre Mining Corp.

Calibre Mining is a Canadian-listed, Americas focused, growing mid-tier gold producer with a strong pipeline of development and exploration opportunities across Nevada and Washington in the United States, and in Nicaragua. Calibre is focused on delivering sustainable value for shareholders, local communities and all stakeholders through responsible operations and a disciplined approach to growth. With a strong balance sheet, a proven management team, strong operating cash flow, accretive development projects and district-scale exploration opportunities Calibre will unlock significant value.

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