Lead, South Dakota--(Newsfile Corp. - April 21, 2026) - Dakota Gold Corp. (NYSE:DC) ("Dakota Gold" or the "Company") is pleased to report the initial assay results received from its 2026 Drill Campaign ("Campaign") at the Richmond Hill Oxide Heap Leach Gold Project ("Richmond Hill" or the "Project"). The Campaign includes 15,481 meters of drilling for 109 holes and consists of a combination of infill, expansion and geotechnical drilling. Gold and silver assay results from the 2025 and 2026 drill campaigns at Richmond Hill will be incorporated into a Pre-Feasibility Study ("PFS") being published in the second half of 2026.

Highlights from this update include:

Infill drill hole RH26C-388 intersected 1.42 grams per tonne gold (g/t Au) and 5.97 g/t silver (Ag) over 64 meters (91 gram meters Au) and RH26C-396 intersected 2.37 g/t Au and 24.80 g/t Ag over 21.5 meters (51 gram meters Au). Many higher-grade gold mineralization intersections have been encountered in the 2025 and 2026 drill campaigns that exceed the average grade of 0.566 g/t Au published in the July 7, 2025 Initial Assessment with Cash Flow ("IACF"). These above average-grade intersections have the potential to positively impact mine sequencing within the PFS and are being considered in the current trade-off studies.
The initial assay results reported today are primarily from infill drilling in the northern portion of the Project designed to support reserve conversion planned for 2026. This drilling targets areas of previously defined near-surface mineralization where tighter drill spacing is expected to support conversion of inferred resources to the indicated resource category.
Over 75% of the total planned drilling for this year's Richmond Hill Campaign has been completed to date with 11,982 meters in 80 drill holes. Drilling productivity and assay turnaround times remain on track, and the Campaign is expected to be completed in the third quarter of 2026.

Jack Henris, President and COO of Dakota Gold said, "We are pleased with the progress of the Campaign which is now advancing northeast to follow-up on higher-grade gold drill intercepts, as well as to conduct further resource expansion in the area. Upon completion of this resource drilling, we plan to commence geotechnical drilling in early May. The PFS will incorporate new assay information from over 350 drill holes from the 2025 and ongoing 2026 drill campaigns. This drilling represents up to approximately 30% new assay information relative to the mineral resource estimate published in the IACF, and it is expected to provide input for optimizing mine planning and sequencing. As we move toward completion of the PFS, we will illustrate Richmond Hill to be a technically robust, de-risked oxide heap leach gold project with a clear pathway to production."

Figure 1. Plan Map showing location of Dakota Gold Corp. Richmond Hill drill results reported today in Table 1.

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Table 1. Richmond Hill Drill Results (Metric / Imperial)^{1,2,3,4,5, 6}

Hole #	From (m)	To (m)	Interval (m)	Grade Au (g/t)	g x m Au	Grade Ag (g/t)	g x m Ag	From (ft)	To (ft)	Interval (ft)	Grade Au (oz/ton)
RH25R-001	76.2	89.9	13.7	0.85	12	4.01	55	250.0	295.0	45.0	0.025
	150.9	157.0	6.1	0.53	3	3.49	21	495.0	515.0	20.0	0.016
	202.7	207.3	4.6	0.81	4	7.37	34	665.0	680.0	15.0	0.024
RH25R-002	56.4	73.2	16.8	0.99	17	9.18	154	185.0	240.0	55.0	0.029
	80.8	96.0	15.2	2.96	45	35.80	546	265.0	315.0	50.0	0.086
inc.	88.4	89.9	1.5	16.15	25	86.40	132	290.0	295.0	5.0	0.471
	111.3	115.8	4.6	0.50	2	4.52	21	365.0	380.0	15.0	0.015
RH26C-363	64.8	80.1	15.3	0.92	14	25.52	391	212.6	262.8	50.2	0.027
	90.2	101.4	11.2	0.73	8	3.50	39	296.0	332.8	36.8	0.021
	113.8	117.7	3.9	1.43	6	7.14	28	373.3	386.0	12.7	0.042
RH26C-365	53.6	66.1	12.4	0.59	7	9.45	118	176.0	216.8	40.8	0.017
RH26C-366	108.9	112.1	3.2	2.13	7	3.97	13	357.2	367.8	10.6	0.062
RH26C-367	7.8	23.5	15.6	0.78	12	13.09	205	25.7	77.0	51.3	0.023
RH26C-368	2.0	11.0	9.0	1.74	16	21.66	195	6.4	36.0	29.6	0.051
	16.9	25.8	8.9	0.63	6	7.29	65	55.4	84.6	29.2	0.018
	29.1	45.9	16.9	0.61	10	5.73	97	95.4	150.7	55.3	0.018
RH26C-369	12.2	15.2	3.0	0.53	2	4.31	13	40.0	50.0	10.0	0.016
	83.0	95.1	12.1	0.69	8	18.97	230	272.3	312.0	39.7	0.020
RH26C-370	47.5	60.6	13.0	1.25	16	4.12	54	156.0	198.7	42.7	0.036
	87.8	92.0	4.2	0.60	2	3.53	15	288.1	301.8	13.7	0.017
RH26C-371	46.2	71.4	25.2	0.81	20	11.84	299	151.6	234.3	82.7	0.024
	91.4	99.1	7.6	0.81	6	5.89	45	300.0	325.0	25.0	0.024
	105.2	114.8	9.7	0.90	9	5.56	54	345.0	376.8	31.8	0.026
RH26C-372	0.0	8.2	8.2	0.59	5	2.83	23	0.0	27.0	27.0	0.017
	117.8	126.7	8.9	1.48	13	8.19	73	386.5	415.6	29.1	0.043
	156.3	163.7	7.4	1.23	9	3.04	23	512.7	537.0	24.3	0.036
RH26C-373	52.0	73.9	21.9	1.27	28	16.92	371	170.5	242.5	72.0	0.037
	83.2	86.3	3.1	0.73	2	3.51	11	272.9	283.0	10.1	0.021
RH26C-374	10.2	18.9	8.7	0.99	9	6.12	53	33.6	62.0	28.4	0.029
	23.8	30.5	6.7	0.72	5	6.15	41	78.2	100.1	21.9	0.021
	64.5	68.5	4.1	0.73	3	4.34	18	211.5	224.8	13.3	0.021
	80.3	84.4	4.1	0.57	2	3.36	14	263.6	277.0	13.4	0.017
	135.5	151.1	11.1	0.65	7	14.00	155	444.7	495.6	36.4	0.019
RH26C-375	93.8	98.8	5.0	0.52	3	15.14	75	307.7	324.0	16.3	0.015
	140.1	145.1	5.0	0.56	3	1.76	9	459.7	476.0	16.3	0.016
RH26C-376	70.7	97.7	27.0	1.07	29	14.61	394	232.0	320.6	88.6	0.031
RH26C-377	No Significant Results
RH26C-378	76.1	79.9	3.8	0.68	3	3.01	11	249.7	262.2	12.5	0.020
RH26C-379	107.9	128.6	20.7	1.17	24	6.63	137	354.0	422.0	68.0	0.034
	132.1	135.9	3.9	0.72	3	18.73	72	433.3	446.0	12.7	0.021
RH26C-380	No Significant Results
RH26C-382	No Significant Results
RH26C-383	11.1	15.5	4.4	0.65	3	5.80	25	36.4	50.8	14.4	0.019
	33.0	45.6	12.6	0.69	9	2.80	35	108.2	149.6	41.4	0.020
	83.3	88.3	5.0	1.21	6	7.37	37	273.4	289.8	16.4	0.035
	139.6	142.9	3.3	1.81	6	70.47	232	458.0	468.8	10.8	0.053
RH26C-384	84.3	90.1	5.9	0.53	3	4.41	26	276.5	295.7	19.2	0.015
	221.3	229.1	7.8	0.76	6	26.29	206	726.0	751.7	25.7	0.022
RH26C-385	114.1	124.1	9.9	0.56	6	58.75	582	374.5	407.0	32.5	0.016
RH26C-386	161.2	165.1	3.9	0.62	2	6.76	26	528.9	541.6	12.7	0.018
	168.5	172.0	3.5	0.81	3	7.86	28	552.8	564.3	11.5	0.024
	196.9	200.7	3.8	0.54	2	16.19	61	646.0	658.4	12.4	0.016
	214.9	219.6	4.7	0.69	3	7.50	35	705.0	720.5	15.5	0.020
	233.7	242.9	9.3	0.99	9	14.78	137	766.6	797.0	30.4	0.029
RH26C-388	0.0	9.3	9.3	0.76	7	6.15	57	0.0	30.6	30.6	0.022
	24.0	87.2	64.0	1.42	91	5.97	382	78.6	286.0	207.4	0.041
RH26C-390	93.6	100.6	7.0	0.62	4	10.12	71	307.0	330.0	23.0	0.018
	103.9	107.3	3.4	1.05	4	28.13	94	341.0	352.0	11.0	0.030
	116.1	120.7	4.6	0.62	3	5.22	24	381.0	396.0	15.0	0.018
RH26C-391	4.8	24.6	19.8	0.79	16	6.65	132	15.8	80.8	65.0	0.023
	45.1	52.9	7.8	0.55	4	6.65	52	147.9	173.6	25.7	0.016
RH26C-392	No Significant Results
RH26C-395	21.5	25.6	4.1	1.92	8	3.56	14	70.7	84.0	13.3	0.056
	50.9	54.6	3.7	4.07	15	1.89	7	167.0	179.0	12.0	0.119
	125.0	134.1	9.1	1.59	15	9.83	90	410.0	440.0	30.0	0.046
RH26C-396	3.6	7.3	3.7	0.99	4	14.26	53	11.9	24.0	12.1	0.029
	10.8	17.6	6.8	1.21	8	15.19	104	35.5	57.9	22.4	0.035
	20.7	42.2	21.5	2.37	51	24.80	533	68.0	138.5	70.5	0.069
inc.	29.9	31.1	1.2	16.10	20	39.30	48	98.0	102.0	4.0	0.470
RH26C-397	83.0	103.0	20.1	1.15	23	4.66	93	272.2	338.0	65.8	0.034
	127.6	148.0	20.4	1.84	38	6.69	137	418.7	485.7	67.0	0.054

The table may contain rounding errors.

Abbreviations in the table include ounces per ton ("oz/ton"); grams per tonne ("g/t"); feet ("ft"); meter ("m"); gram meters ("g x m").
True thickness unknown.
Intervals calculated based on 0.5 g/t Au cut-off and maximum dilution of 3.05 meters.
The July 7, 2025 Initial Assessment with Cash Flow has an open pit designed with 12.2m (40 ft) benches. The average grade for the Measured and Indicated mine plan is 0.566 g/t Au (0.017 oz/ton). A gram meter of 7 and above has been highlighted in Table 1 based on the bench height and average grade.
The following monitoring water well holes drilled outside of the resource area for permitting has confirmed no significant gold mineralization: BG-GW-01, BG-GW-12, CC-GW-08, CC-GW-10, CC-GW-12B
The following southeast infrastructure drill holes outside of the planned mining area has confirmed no significant gold mineralization: RH26C-362; RH26C-364

About Dakota Gold Corp.

Dakota Gold is expanding the legacy of the 145-year-old Homestake Gold Mining District by advancing the Richmond Hill Oxide Heap Leach Gold Project to commercial production as soon as 2029, and outlining a Tertiary maiden resource as well as a high-grade underground gold resource at the Maitland Gold Project, both located on private land in South Dakota.

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Shareholder and Investor Inquiries

For more information, please contact:

Jack Henris
President and COO
Tel: +1 605-717-2540

Shawn Campbell
Chief Financial Officer
Tel: +1 778-655-9638

Carling Gaze
VP of Investor Relations and Corporate Communications
Tel: +1 605-679-7429
Email: info@dakotagoldcorp.com

Qualified Person and S-K 1300 Disclosure

William Gehlen, a Certified Professional Geologist (CPG-10626) with the AIPG , American Institute of Professional Geologists, a Senior Fellow with the SEG, and Senior Manager - Geology of Dakota Gold Corp., is the Company's designated qualified person (as defined in Subpart 1300 of Regulation S-K) for this news release and has reviewed and approved its scientific and technical content.

Quality Assurance/Quality Control consists of regular insertion of certified reference materials, duplicate samples, and blanks into the sample stream. Samples are submitted to the ALS Geochemistry sample preparation facility in Winnipeg, Manitoba. Gold and multi-element analyses are performed at the ALS Geochemistry laboratory in Vancouver, British Columbia. ALS Minerals is an ISO/IEC 17025:2017 accredited lab. Check samples are submitted to Bureau Veritas, Vancouver B.C. as an umpire laboratory. Assay results are reviewed, and discrepancies are investigated prior to incorporation into the Company database.

Forward-Looking Statements

This communication contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. When used in this communication, the words "plan," "target," "anticipate," "believe," "estimate," "intend," "potential," "will" and "expect" and similar expressions are intended to identify such forward-looking statements. Any express or implied statements contained in this communication that are not statements of historical fact may be deemed to be forward-looking statements, including, without limitation: our expectations regarding additional drilling, metallurgy and modeling; our expectations for the improvement and growth of the mineral resources and potential for conversion of mineral resources into reserves; completion of a pre-feasibility study, a feasibility study, and/or permitting; and our overall expectation for the possibility of near-term production at the Richmond Hill project. These forward-looking statements are based on assumptions and expectations that may not be realized and are inherently subject to numerous risks and uncertainties, which could cause actual results to differ materially from these statements. These risks and uncertainties include, among others: the execution and timing of our planned exploration activities; our use and evaluation of historic data; our ability to achieve our strategic goals; the state of the economy and financial markets generally and the effect on our industry; and the market for our common stock. The foregoing list is not exhaustive. For additional information regarding factors that may cause actual results to differ materially from those indicated in our forward-looking statements, we refer you to the risk factors included in Item 1A of the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2025, as updated by annual, quarterly and current reports that we file with the SEC, which are available at www.sec.gov. We caution investors not to place undue reliance on the forward-looking statements contained in this communication. These statements speak only as of the date of this communication, and we undertake no obligation to update or revise these statements, whether as a result of new information, future events or otherwise, except as may be required by law. We do not give any assurance that we will achieve our expectations.

All references to "$" in this communication are to U.S. dollars unless otherwise stated.

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Dakota Gold Intersects 1.42 g/t Gold and 5.97 g/t Silver over 64.0 Meters with Infill Drilling at Richmond Hill