Mineralization Within the Rhosgobel Gold Deposit, Including 128.0 Metres of 0.115%

NEWS RELEASE April 15, 2026 NR 26-11 ​ ​ www.sitkagoldcorp.com

SITKA GOLD CONFIRMS SIGNIFICANT TUNGSTEN MINERALIZATION WITHIN THE RHOSGOBEL GOLD DEPOSIT, INCLUDING 128.0 METRES OF 0.115% WO3, AT ITS RC GOLD PROJECT, YUKON

●​ Approximately 5,500 samples from 33 drill holes completed within the Rhosgobel deposit

analyzed for tungsten (WO3)

●​ Results confirm significant tungsten mineralization over a broad 850 m strike length ●​ Drill hole DDRCRG-25-006 returned 128.0 m of 0.115% WO3 ●​ Drill hole DDRCRG-25-010 returned 113.2 m of 0.116% WO3 ●​ Drill hole DDRCRG-25-033 returned 152.3 m of 0.109% WO3 ●​ 60,000 m diamond drill program underway with 4 drill rigs currently operating at RC Gold

Vancouver, Canada, April 15, 2026: The Board of Directors of Sitka Gold Corp. (TSX-V: SIG) (FSE:1RF) (OTCQX:SITKF) (“Sitka” or “Sitka Gold” or the “Company”) is pleased to announce that it has received tungsten trioxide (WO3) XRF assays for 33 holes in drilled into the Rhosgobel intrusion in 2025. Results are pending for 2 remaining holes. Approximately 5500 samples from 33 diamond drill holes were selected for additional testing to provide an accurate tungsten analysis to determine the grade and distribution of tungsten mineralization within the Rhosgobel gold deposit after strong tungsten values were observed from initial multi-element analysis of drill core.

Results demonstrate the potential for tungsten to be a significant by-product at the Rhosgobel gold deposit. Initial metallurgical testwork is in progress to determine potential recovery of a tungsten concentrate. All of the holes that were submitted for additional assaying returned significant tungsten intersections and are located within the Maiden Mineral Resource Estimate (MRE) defined for the Rhosgobel Deposit consisting of a pit-constrained inferred mineral resource of 2.25 million ounces of gold (100.68 Mt @ 0.70 g/t Au) beginning at surface, using a cut-off grade of 0.30 g/t gold. (Simpson, R., 2026. RC Gold Project, NI 43-101 Technical Report, Dawson Mining District, Yukon Territory, March 31, 2026).

Table 1: Highlight summary of tungsten assays

*Intervals are drilled core length, as insufficient drilling has been completed at this time to determine true widths.

“These latest results confirm the potential for tungsten to be a significant, high-value by-product at our newly discovered Rhosgobel gold deposit,” said Cor Coe, Director and CEO of Sitka Gold. “The Rhosgobel deposit, which begins at surface and remains open in all directions, has rapidly evolved into one of the most compelling targets within our district-scale RC Gold Project, advancing from discovery to an initial inferred mineral resource estimate of 2.25 Moz of gold with just a few months worth of drilling. We now have evidence that tungsten could add significant value to this deposit as an economic by-product of potential future production. Tungsten is one of the few commodities where a new discovery immediately matters - global supply is highly constrained and tightly controlled, demand is accelerating across defense and advanced manufacturing sectors, and prices are being driven to new highs by structural shortages. In this context, even a modest tungsten discovery has the potential to materially enhance the value and strategic significance of the Rhosgobel deposit. With approximately 30,000 metres of drilling planned at Rhosgobel this year, which will effectively triple the total meterage drilled at Rhosgobel to date, we are looking forward to further defining the exciting potential of this unique deposit.”

Tungsten Mineralization at Rhosgobel

Tungsten mineralization has been observed in all of the drill holes completed to date across the 3x2 km Rhosgobel Intrusion and occurs as coarse (up to 5 cm) scheelite crystals within the sub-metre scale quartz, and quartz tourmaline veins and as smaller (0.5-1 cm) crystals within the centimetre-scale sheeted quartz veins cutting the quartz monzonite intrusion at Rhosgobel. Analytical results demonstrate that Tungsten could be an economic by-product of potential future production at Rhosgobel.

An example of a large, intrusion-related tungsten deposit that is amenable to open-pit mining is Northcliff Resources Sisson Deposit located in New Brunswick - a pre-construction stage tungsten-molybdenum deposit that hosts 387 Mt of tungsten grading 0.067% WO3 in the Measured and Indicated category and 187 Mt of tungsten grading 0.050% WO3 in the Inferred category¹. This project was recently added to Canada’s Nation Building Projects List² and has received funding from both the U.S. Government through the U.S. Defense Production Act³ and the Government of Canada through Natural Resources Canada (NRCan)⁴.

1. https://www.northcliffresources.com/sissonprojecttechnical

2. https://www.northcliffresources.com/post/northcliff-announces-sisson-project-on-canada-s-nation-building-projects-list

3. https://www.northcliffresources.com/post/northcliff-announces-funding-to-accelerate-development-of-the-sisson-critical-minerals-project

4. https://www.northcliffresources.com/post/northcliff-announces-government-of-canada-funding-for-the-sisson-project

Figure 1. Plan Map of the Rhosgobel Intrusion showing gold assays and tungsten composites on the 2024 - 2025 diamond drilling. Drilling to date has been focused on the core of the target area which is supported by a large 1.5 km x 2.0 km gold-in-soil anomaly. Up to 30,000 metres of additional drilling is planned at Rhosgobel this year.

Figure 2. Cross Section for drill holes DDRCRG-25-003 and 004 showing gold and tungsten

Figure 3. Cross Section for drill holes DDRCRG-25-005, 006 and 011 showing gold and tungsten

Figure 4. Cross Section for drill holes DDRCRG-25-009 and 010 showing gold and tungsten

Figure 5. Cross Section for drill holes DDRCRG-25-025 and 028 showing gold and tungsten

Figure 7. Cross Section for drill holes DDRCRG-25-032 and 035 showing gold and tungsten

Figure 8. Long Section through the Rhosgobel Deposit showing the grade shell, block model with gold grades > 1 g/t, and the tungsten assays in the 2025 drilling within current proposed pit limits. Up to 30,000 metres of drilling is planned at Rhosgobel this year.

Figure 9: Example of scheelite (top picture), a common tungsten mineral, illuminated by ultra-violet light with visible gold and bismuthinite (red circles) in a quartz vein in drill core from the Rhosgobel intrusion along with an additional example of visible gold (bottom picture), both observed in DDRCRG-25-042.

Table 2: Summary of tungsten results