Sun Summit Drills Strongest Interval to Date at the Creek Zone: 81.0 Meters of 4.80 g/t Gold from 26 Meters Downhole, Including 14.0 Meters of 19.81 g/t Gold at the JD Project, Toodoggone District, B.C.

2025-11-25

Vancouver, British Columbia--(Newsfile Corp. - November 25, 2025) - Sun Summit Minerals Corp. (TSXV: SMN) (OTCQB: SMREF) ("Sun Summit" or the "Company") is pleased to report the remaining assay results from all 2025 drilling at the Creek Zone, JD Project, Toodoggone Mining District, north-central British Columbia.

Drill hole CZ-25-021 returned the strongest interval of near-surface gold mineralization drilled to date at the Creek Zone: 81.0 meters of 4.80 g/t gold starting at 26.0 meters downhole, including 14.0 meters of 19.81 g/t gold. The drill hole tested the down-dip extent of significant gold mineralization intersected in drill hole CZ-25-007 (78.0 meters of 3.72 g/t gold including 19.1 meters of 7.50 g/t gold, see news release dated September 8th, 2025). This interval extends bulk-tonnage and high-grade gold mineralization to a vertical depth of approximately 150 meters from surface (Figures 2 and 3).

Highlights:

Drill Hole CZ-25-021 tested the down-dip extent of significant gold mineralization intersected in drill hole CZ-25-007 and returned an equally strong zone of near-surface, continuous gold mineralization punctuated with high-grade veins:

81.0 meters of 4.80 g/t gold from 26.0 meters downhole, including

34.0 meters of 9.07 g/t gold, and including

high-grade intercepts of:

155 g/t Au over 1.0 meter at 42.0 meters downhole

101 g/t Au over 1.0 meter at 54.0 meters downhole

30.6 g/t Au over 1.3 meter at 78.0 meters downhole

Confirms the strong high-grade gold potential of the Creek Zone: The 81.0-meter interval in CZ-25-021 is down-dip from the significant interval intersected in CZ-25-007 and extends the zone at depth with strong continuity extending approximately 150 meters from surface. Based on these results, management believes that further drilling down-dip and stepped to the northeast is warranted.

Establishing significant scale-potential at the Creek Zone: Drilling in 2025 outlined a significant, fault-bounded northwest-trending mineralized corridor that spans ~750 meters by 300 meters and ~150 meters vertical depth from surface (Figure 1). Highlight intervals across the Creek Zone in 2025 include:

46.0 meters of 0.9 g/t gold from 20.0 meters downhole and 1.0 meters of 158.5 g/t gold from 134.0 meters downhole and 17.0 meters of 1.25 g/t gold from 151.0 meters downhole in hole CZ-25-008.

17.0 meters of 2.32 g/t gold from 308.5 meters downhole including 13.5 meters of 2.85 g/t Au in hole CZ-25-016, approximately 460 meters southeast of CZ-25-021 (Figures 1 and 2).

15.0 meters of 1.39 g/t gold from 87.0 meters downhole, including 10.5 meters of 1.75 g/t gold in hole CZ-25-018, approximately 100 meters northwest of CZ-25-021 (Figures 1 and 2).

Every hole intersected gold mineralization and the system remains open in all directions across the corridor.

Metallic screen analyses underway: A large selection of Creek Zone drill core from 2024 and 2025 drilling has been submitted for metallic screen analysis to better understand the gold deportment.

Finn Zone and Belle South Porphyry Zone results pending: Assay results are pending from four drill holes from the Finn Zone, located approximately 3.5 km east of the Creek Zone as well as two drill holes from a compelling porphyry target at Belle South, 8 km southeast of the Creek Zone.

"We are pleased to announce very exciting new drill results from the 2025 program on the Creek Zone. The 2025 program was successful in demonstrating large intervals of near-continuous gold and silver mineralization in the near surface portion of the Creek Zone, highlighting high-grade gold in veins, while also identifying important structural features. Every completed drill hole intersected gold-silver mineralization and continues to demonstrate there is a zone of gold and silver mineralization with significant width and depth expansion potential, punctuated by well-mineralized quartz-carbonate veins with some of the highest-grade gold drill intercepts known from the JD property," said Niel Marotta, CEO of Sun Summit Minerals. "The final hole of this year's drill program at the Creek Zone returned the largest gram-meter intercept of both the 2024 and 2025 programs. While we await more exciting results from the Finn and Belle South Zones, we continue modelling and planning for follow-up drill holes at the Creek Zone, which remains open for expansion. Our newest iteration of a robust 3D geological and structural model will inform targeting for the next season and gives us a strong technical advantage relative to historical drilling which failed to recognize the interplay of important orientations of the various structural fabrics inherent to the mineralization domains, including bulk-tonnage and high-grade potential of the Creek Zone."

Table 1. Assay Results for Drill Hole CZ-25-021

HoleFrom_mTo_mInterval_mAu g/tAg g/t

CZ-25-02126.00107.0081.004.803.20

including26.0060.0034.009.076.46

including42.0056.0014.0019.8110.89

including42.0043.001.00155.0036.30

including54.0055.001.00101.0077.90

including55.0056.001.009.557.65

including64.0083.0019.002.381.34

including78.0079.331.3330.6012.55

including87.00107.0020.001.740.65

including96.0097.651.6510.103.00

and117.45123.005.550.772.95

and347.00353.006.000.270.14

Notes:

1. Intervals are downhole core lengths. True widths are unknown.

2. Calculations are uncut and length-weighted using a 0.10 g/t gold cut-off.

3. Grades have not been capped in the length-weighted averaging.

2025 Creek Zone Drill Program

Drilling in 2025 at the Creek Zone was designed to investigate the lateral and vertical extent of high-grade and bulk-tonnage gold mineralization (Figures 1 and 2). Results of 15 HQ diameter drill holes for 5,110 meters of drilling are being used to evaluate the newly modeled structural architecture of the zone. These holes were designed to systematically test the vein-controlling structures on 50 to 100 meter pierce-points covering a strike-length of over 800 meters and a down-dip extent of over 200 meters (Figures 1 and 2). A total of 3,079 samples were taken representing an average sample length of 1.64 meters.

Figure 1. Plan map showing drill collar locations of all Creek Zone drill holes. Selected highlights from the 2024 drill program at the Creek Zone are also shown (see October 2nd, 2024 and October 16th, 2024 news releases). Inset plan map of new structural model of the Creek Zone showing the main bounding hanging wall and foot wall faults (purple), antithetical interal fault zones (light blue) and main-fault parallel veins (red). See references 1 and 2 for sources of historical drill data.

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Drill Hole CZ-25-021

Drill hole CZ-25-021 was collared from the same pad as CZ-25-007 (78.0 meters of 3.72 g/t gold including 19.1 meters of 7.50 g/t gold, see news release dated September 8th, 2025), however it was swung to the southeast with a 230o azimuth and a steeper dip of -68o (Table 3). The pad is 75 meters to the north of hole CZ-24-004 (122.53 metres of 2.11 g/t gold including 4.04 metres of 46.78 g/t gold, see October 2, 2024 news release) and stepped out 100 meters west of hole CZ-24-005 (57.95 meters of 2.69 g/t gold including 19.50 meters of 7.31 g/t gold, see October 16, 2024 news release, Figure 1). The hole was designed to test the down-dip extent of gold mineralization intersected in drill hole CZ-25-007.

Figure 2. Oblique long section view through the Creek Zone drill holes showing downhole assays for all drill holes including CZ-25-007 and CZ-25-021. Selected highlights from the 2024 drill program at the Creek Zone are also shown (see October 2nd, 2024 and October 16th, 2024 news releases). See references 1 and 2 for sources of historical drill data.

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The upper interval of strong disseminated and high-grade vein-hosted gold mineralization in CZ-25-021 (e.g., 81.0 meters of 4.80 g/t gold, Table 1) is approximately 25 to 50 meters down-dip and offset along strike from the significant zone of gold mineralization in CZ-25-007 (Figure 3). These intercepts are interpreted by management to represent a new zone of mineralization that trends parallel to- and/or along-strike from the main, steeply-dipping northwest-striking vein-sets (e.g., 22.0 m of 11.7 g/t Au including 4.0 m of 61.2 g/t Au, in hole CZ97-0081) intersected in previous drill programs to the south (Figure 1).

The upper interval in CZ-25-021 contains multiple high-grade veins and breccias (155.0 g/t gold over 1.0-meter, 101.0 g/t gold over 1.0 meter, and 30.6 g/t gold over 1.3 meters, Table 1) within the broad zone of disseminated gold mineralization (Figure 4). Similar to CZ-25-007, many of these higher-grade intervals contain fine visible gold (Figure 4). The numerous high-grade veins intersected in many holes near CZ-25-021 (e.g., JD-97-008, CZ-24-004, CZ-24-005. CZ-25-007, CZ-25-008) support the strong, high-grade potential of the Creek Zone and validate the newly developed structural model.

Figure 3. Cross section through drill holes CZ-25-007 and CZ-25-021 showing downhole assay data.

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Southeast Extension

Drill holes CZ-25-008, 009, 010, 011, 012, 013, 014, 015, 016 and 017 tested the southeastern extent of bulk-tonnage and high-grade gold mineralization along the Creek Zone structural corridor. All holes intersected gold mineralization and demonstrated a northwest, structurally controlled zone measuring at least 750 meters by 300 meters and approximately 150 meters vertical. This mineralized corridor is open for expansion along strike and down-dip (Figure 1 and 2). Management believes that further drilling is warranted to test for parallel mineralized structures to the north and up-dip of hole CZ-25-017 (Figure 1).

Drill hole CZ-25-016 intersected 17.0 meters of 2.32 g/t gold from 308.5 meters downhole including 13.5 meters of 2.85 g/t Au (Figures 1 and 2 and Table 2). This interval is approximately 460 meters southeast of CZ-25-021 (Figures 1 and 2). Drill hole CZ-25-014 intersected a broad zone of near-surface gold mineralization, 64.0 meters of 0.60 g/t gold including 11.0 meters of 1.23 g/t gold from 47 meters downhole. This interval is approximately 120 meters from CZ-25-021. Holes CZ-25-016, CZ-25-014 and all holes along the structural corridor highlight the significant scale potential of the Creek Zone (Figures 1 and 2).

Structural Model

Orientated drill core data from 2024 and 2025, geological mapping and historical drill data were incorporated into the first-ever 3D geological and structural model of the Creek Zone to guide exploration drilling. Two distinct fault sets appear in the drill core and surface mapping: ~295-300° trend and 315-320° trend both dipping ~50°. Intersections of these two fault sets appears to be a major control on mineralization with vein-oriented core data suggesting an assemblage of individual NW striking, steeply dipping veins. Taken together the Creek Zone represents a simple shear deformation zone with secondary and antithetic mineralized fractures and structural intersections that produced mineralization pathways and the formation of the high-grade gold veins and vein-breccias intercepted in drill holes clustered around holes CZ-25-007 and CZ-25-021.

Management believes that additional drilling along the entire Creek Zone structural corridor is warranted to test for these north-plunging zones of higher-grade mineralization along fault-intersections which may have been missed in previous drill programs due the orientations of many of the historic drill holes.

Creek Zone Geology

All drill holes across the Creek Zone intersected a bedded sequence of intermediate volcanic and volcaniclastic rocks re-interpreted from 2025 mapping to be a sequence within the lower feldspar-hornblende unit of the Metsantan Member of the Early Jurassic Toodoggone formation. Higher-grade gold mineralization is hosted in epithermal-related and locally banded quartz-carbonate veins, veinlets and sulfide-cemented breccias with locally strong potassium feldspar alteration halos (Figure 4). Vein-hosted sulfides include pyrite, sphalerite, ± chalcopyrite and galena with some veins containing visible gold. Bulk-tonnage mineralization is associated with selectively pervasive sericite-chlorite-hematite alteration with disseminated pyrite, proximal to vein-associated potassic alteration (Figure 4).

Next Steps

A selection of samples from 2024 and 2025 drilling at the Creek Zone has been submitted to the ALS Global analytical facility in North Vancouver, British Columbia for metallic screen fire assay to better define the nature and grade of gold mineralization. The metallic screen method utilises a larger sample and a tailored preparation procedure to systematically capture native gold, if present. These methods yield a more robust analytical and statistical estimate of gold grade. Results from this metallic screen study will be compared to the traditional fire assay data to define a statistical based workflow for sampling and analyzing intervals with high-grade gold mineralization.

Assay results are pending for four holes drilled at the Finn Zone, located approximately 3.5 km east of the Creek Zone, and two drill holes from the Belle South Porphyry Zone, located approximately 8.0 kilometers southeast from the Creek Zone.

Table 2. Assay Results for Drill Holes CZ-25-008 to CZ-25-020

HoleFrom_mTo_mInterval_mAu g/tAg g/t

CZ-25-00820.0066.0046.000.901.92

including20.0034.0014.001.514.37

including22.5426.844.303.173.77

including41.0066.0025.000.801.04

including55.0060.005.002.893.58

and79.00105.0026.000.310.15

including84.00105.0021.000.350.15

and134.00135.001.00158.5010.05

and151.00168.0017.001.250.80

including162.63164.501.879.566.38

and192.00203.0011.000.480.13

including198.00201.003.001.130.15

CZ-25-00993.00104.0011.000.300.29

and109.00114.005.000.390.37

and155.67191.5335.860.370.81

and241.00254.0013.000.290.31

CZ-25-010116.00119.233.230.940.37

and132.00135.003.000.262.90

and141.71176.0034.290.540.73

including153.14170.0016.860.731.08

including154.39161.757.361.070.76

and207.50212.755.250.901.08

CZ-25-01187.0091.004.000.330.02

and127.00174.0047.000.580.63

including127.00141.0014.000.610.60

including132.00136.004.001.040.58

including145.00174.0029.000.640.72

including150.00157.007.001.171.79

and222.00224.002.000.850.03

and247.02252.025.000.400.05

CZ-25-012131.44135.444.000.740.83

and165.00208.0043.000.720.48

including165.00175.0010.001.360.38

and309.00320.0011.000.250.28

CZ-25-01348.0064.0016.000.941.50

including48.0054.006.001.612.93

and78.0086.008.000.300.33

and96.00102.006.001.132.77

and108.00117.009.001.002.08

and153.00157.004.001.790.81

and205.00209.004.003.2310.32

and231.00233.002.000.330.86

CZ-25-01447.00111.0064.000.600.83

including47.0058.0011.001.231.53

including61.0067.006.000.390.67

including73.0099.0026.000.711.05

including81.0099.0018.000.931.44

including104.00111.007.000.470.09

and211.00218.007.001.501.15

including215.00218.003.003.382.22

CZ-25-015126.49132.005.511.190.44

and164.00166.002.000.610.10

and176.00191.0015.001.180.71

and196.00198.002.000.350.17

CZ-25-01667.7071.003.300.560.45

and152.00156.004.000.630.53

and159.00163.004.000.340.12

and222.00233.5011.500.300.39

and276.00285.009.000.421.20

and308.50325.5017.002.321.24

including308.50322.0013.502.850.88

including308.50313.004.507.901.85

CZ-25-017109.00128.0019.000.450.45

including120.23128.007.770.800.67

including120.23122.001.772.871.92

and296.35297.651.301.007.37

CZ-25-01887.00102.0015.001.390.79

including90.00100.5010.501.750.76

and112.00133.0021.000.681.41

including126.00131.005.001.763.88

and306.00310.004.000.360.07

CZ-25-01986.00172.0086.000.362.59

including105.00117.0012.000.632.41

including123.00128.005.001.2713.97

including144.00157.0013.000.681.50

and252.00257.005.000.800.29

and364.00366.002.002.050.67

CZ-25-020100.00132.0032.000.432.06

including103.00112.009.001.205.80

and149.00164.0015.000.282.43

and168.10174.005.900.310.46

and253.00262.139.130.370.78

and276.00285.009.000.310.08

and301.00305.004.000.313.80

and318.85325.006.150.251.04

and330.00332.002.000.390.70

and341.00349.008.000.280.34

Notes:

1. Intervals are downhole core lengths. True widths are unknown.

2. Calculations are uncut and length-weighted using a 0.10 g/t gold cut-off.

3. Grades have not been capped in the length-weighted averaging.

Figure 4. Core photos of CZ-25-021, A. Box photos showing core from 22.17 meters to 62.30 meters downhole which includes a broad interval of 34.0 meters of 9.07 g/t Au and two high-grade intervals of 155 g/t Au over 1.0 meter and 101 g/t Au over 1.0 meter. Individual down hole gold assay results are annotated at the sample depths. B. high-grade quartz-sulfide vein with visible gold at 54.1 meters down hole. C. sulfide-cemented hydrothermal breccia at 54.9 meters down hole with visible gold Abbreviations, qtz = quartz, carb = carbonate, sph = sphalerite, cpy = chalcopyrite.

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Figure 5. Map of the Toodoggone District showing the location of the JD Project in relation to other development and exploration projects. Data sourced from Thesis Gold Inc., TDG Gold Corp. and Centerra Gold Inc.'s respective corporate websites. The QP has been unable to verify the information and the information is not necessarily indicative to the mineralization on the property that is the subject of the disclosure.

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Table 3. Drill Collar Information

Hole IDEastingNorthingElevation (m)AzimuthDipDepth (m)

CZ-25-00760827763683911508255-45341

CZ-25-00860827963683881507217-45243

CZ-25-00960847263682711575240-55296

CZ-25-01060847363682701575225-50251

CZ-25-01160853963682001594225-45263

CZ-25-01260854163682001594200-55341

CZ-25-01360835563683451534200-50377

CZ-25-01460835363683461533225-53317

CZ-25-01560866263681331629230-45320

CZ-25-01660866363681331630230-65455

CZ-25-01760876963680891646230-50503

CZ-25-01860826863684881508225-45310

CZ-25-01960826863684871508200-52373

CZ-25-02060826763684881508225-65363

CZ-25-02160828163683911509230-68357

Coordinates are in UTM NAD83 Zone 9N

Quality Assurance and Quality Control

All drill core sample assay and analytical results have been monitored through the Company's quality assurance and quality control program (QA/QC). Drill core was sawn in half at Sun Summit's dedicated and secure core logging and processing facility at the JD exploration camp.

Half of the drill core was sampled and shipped by a bonded courier in sealed and secured woven polyester bags to the ALS Global preparation facilities in Kamloops, BC. Core samples were prepared using ALS standard preparation procedure PREP-31A which involves crushing the sample to 70% less than 2mm, followed by a riffle split of 250g, and then a pulverised split to better than 85% passing 75 microns.

Following sample preparation, the pulps were sent to the ALS Global analytical laboratory in North Vancouver, B.C. for analysis. ALS Global is registered to ISO/IEC 17025:2017 accreditations for laboratory procedures.

Drill core samples were analyzed for 48 elements by ICP-MS on a 0.25-gram aliquot using a four-acid digestion (method ME-MS61). This method is considered a "ultra trace element" analytical method with low detection limits on key pathfinder elements such as Ag, As, Sb, Se and Tl.

Gold was analyzed by fire assay on a 30-gram aliquot with an AES finish (inductively coupled plasma atomic emission spectroscopy - method Au-ICP21). Samples that returned >10 parts per million (ppm) gold were re-analyzed by fire assay using a gravimetric finish on a 30-gram aliquot (method Au-GRA21).