San Juan SilverCreede, Colorado

Opinaca / WildcatJames Bay, Québec

Heva-HoscoVal d’Or, Québec

KinskuchAlice Arm, BC

(mill) AuroraMineral County, Nevada

Hatter GrabenElko County, Nevada

Rock CreekNoxon, Montana

MontanoreLibby, Montana

San SebastianDurango, Mexico

Greens CreekAdmiralty Island, Alaska

Lucky FridayMullan, Idaho

Casa BerardiVal d’Or, Québec

HollisterElko County, Nevada

Fire CreekLander County, Nevada

MidasElko County, Nevada

Winnemucca, Nevada

Monte CristoEsmeralda County, Nevada

Val d’Or, QuébecVancouver, BC

Coeur d’Alene, Idaho

pre-development project

exploration project

corporate office

operating mine / mill

Hecla Mining Company is not only the largest and one of the lowest-cost U.S. silver producers, and the third largest U.S. producer of both zinc and lead, but also a growing gold producer.Hecla owns and operates mines on district-sized land packages in mining-friendly North American jurisdictions: Greens Creek in Alaska, one of the largest and highest-margin primary silver mines in the world; the Lucky Friday silver mine in North Idaho; the San Sebastian silver-gold mine near Durango, Mexico; the Casa Berardi gold mine in Quebec; and the Nevada operations. In addition to its diversified silver and gold operating and cash-flow generating base, Hecla has a number of exploration properties and pre-development projects in eight world-class silver and gold mining districts in the U.S., Canada, and Mexico.

2019 silver production was 12.6 million ounces and a company record of 272,873 ounces of gold production. 2020 estimated silver production of 12.4-13.0 million ounces and gold production of 199,000-210,000 ounces.

The company is positioned to weather COVID-19 with strong assets, an established action plan, senior notes due in 2028, and solid liquidity.

Greens Creek – Admiralty Island, Alaska■■ One of the world’s largest and lowest-cost primary silver mines.■■ Produced approx. 25M oz. of silver and 1.6M oz. of gold since startup in 1989.■■ 2.6 M oz. of silver production and 12,838 oz. of gold production in Q3/20; 2020E

production of 10-10.3 M oz. of silver and 47-48 K oz. of gold.

Casa Berardi – Val d’Or, Quebec■■ 26,405 oz. of gold production in Q3/20; 2020E production of 114-124 K oz. of gold.■■ High-grade intersections discovered at East Mine.■■ Restarted production on April 16 after provincial shutdown due to COVID-19.

San Sebastian – Durango, Mexico■■ 0.3 M oz. of silver production and 1,931 oz. of gold production in Q3/20; 2020E

production of 0.8-0.9 M oz. of silver and 6 K oz. of gold.■■ Strong exploration potential to extend mine life with El Toro and Hugh Zone

deposits.■■ Mining was completed in the third quarter and milling is expected to be completed in

the fourth quarter of 2020.

Nevada Operations – Elko, Nevada■■ Ore mined was stockpiled in Q3 for the third-party processing expected in the fourth

quarter; 2020E production of 32 K oz. of gold.■■ Strong exploration potential over 110-square miles of property in key gold mining

region.

Lucky Friday – Mullan, Idaho■■ Mine is expected to be in full production at year-end 2020.■■ 0.6 M oz. of silver production in Q3/20; 2020E production of 1.6-1.8 M oz. of silver.■■ Remote Vein Miner expect delivery after completion of reliability testing in Sweden.

Multiple Secure Revenue Streams

Low Political Risk Jurisdictions

Established Work Force

Commitment to Safety

High-Quality Operations

Strong Cash Flow Flexibility

Healthy Cash Margins

Strong Financial Position

Strong Investment

Fundamentals

Share Performance NYSE: HLend of Q2: 06/30/20, (1) as of 10/09/20 Share Price: $5.53(1)

52-Week Range: $1.40 – $6.79(1)

Basic Shares: 527.8 millionFully Diluted: 538.0 millionMarket Capitalization: $2.9B (1)

OPERATING MINES

OCTOBER 2020 INVESTOR FACT SHEET

HECLA-MINING.COM

Investor Inquiries 800.HECLA91 (800.432.5291) hmc-info@hecla-mining.com

NYSE:HL

Reconciliation of Cost of Sales and Other Direct Production Costs and Depreciation, Depletion and Amortization, the most comparable GAAP measurement, to Cash Cost, After By-Product Credits, per Silver Ounce for Greens Creek, Lucky Friday & San Sebastian (dollars and ounces in thousands, except per ounce) Q2/2019 Q3/2019 Q4/2019 Q1/2020 Q2/2020 Costs of sales and other direct production costs and depreciation, depletion and amortization (GAAP) $ 61,744 $ 57,335 $ 91,124 $ 60,314 $ 73,137Depreciation, depletion and amortization (13,120) (12,634) (18,481) (14,204) (15,777)Treatment costs 11,726 13,566 15,546 16,362 23,095Change in product inventory 3,746 7,987 (11,590) 4,037 (4,536)Reclamation and other costs (1,355) (386) (1,641) (42) (203)Exclusion of Lucky Friday Costs (4,412) (4,084) (6,546) (3,876) (12,475)Cash cost, before by-product credits (1) 58,329 61,784 68,412 62,591 63,241By-product credits (48,414) (54,564) (57,076) (44,578) (48,760)Cash cost, after by-product credits $ 9,915 $ 7,220 $ 11,336 $ 18,013 $ 14,481Divided by silver ounces produced 2,836 3,085 3,164 3,123 2,912Cash cost, before by-product credits, per silver ounce $ 20.57 $ 20.03 $ 21.62 $ 20.03 $ 21.71 By-product credits per silver ounce $ (17.07) $ (17.69) $ (18.04) $ (14.27) $ (16.74)Cash cost, after by-product credits, per silver ounce $ 3.50 $ 2.34 $ 3.58 $ 5.76 $ 4.97 (1) Includes all direct and indirect operating cash costs related to the physical activities of producing metals, including mining, processing and other plant costs, third-party refining and marketing expense, on-site general and administrative

costs, royalties and mining production taxes, net of by-product revenues earned from all metals other than the primary metal produced at each unit.

(dollars in thousands, except per share amounts) Q2/2020 Q1/2020 2019 2018 2017Sales of products $ 166,355 $ 136,925 $ 673,266 $ 567,137 $ 577,775Net income (loss) (14,028) (17,185) (99,557) (26,563) (28,520)Cash provided by operating activities 42,453 4,927 120,866 94,221 115,878Cash, cash equivalents and short-term investments at end of reporting period 75,923 215,715 62,452 27,389 219,865Dividend per Common Share 0.0025 0.0025 0.01 0.01 0.01

Largest Institutional Owners

(research as of 06/30/20)Van Eck Associates Corporation The Vanguard Group, Inc. BlackRock Institutional Trust Company, N.A. Dimensional Fund Advisors, LP State Street Global Advisors (US) Mirae Asset Global Investments (USA) LLCETF Managers Group, LLC Geode Capital Management, LLCNorthern Trust Investments, Inc.Renaissance Technologies LLC

Qualified Person (QP) Pursuant to Canadian National Instrument 43-101 Kurt D. Allen, MSc., CPG, Director - Exploration of Hecla Limited and Keith Blair, MSc., CPG, Chief Geologist of Hecla Limited, who serve as a Qualified Person under National Instrument 43-101, supervised the preparation of the scientific and technical information concerning Hecla’s mineral projects in this fact sheet, including with respect to the newly acquired Nevada projects. Information regarding data verification, surveys and investigations, quality assurance program and quality control measures and a summary of sample, analytical or testing procedures for the Greens Creek Mine are contained in a technical report prepared for Hecla titled “Technical Report for the Greens Creek Mine, Juneau, Alaska, USA” effective date December 31, 2018, and for the Lucky Friday Mine are contained in a technical report prepared for Hecla titled “Technical Report on the Lucky Friday Mine Shoshone County, Idaho, USA” effective date April 2, 2014, for the Casa Berardi Mine are contained in a technical report prepared for Hecla titled “Technical Report on the Mineral Resource and Mineral Reserve Estimate for the Casa Berardi Mine, Northwestern Quebec, Canada” effective date December 31, 2014 (the “Casa Berardi Technical Report”), and for the San Sebastian Mine are contained in a technical report prepared for Hecla titled “Technical Report for the San Sebastian Ag-Au Property, Durango, Mexico” effective date September 8, 2015. Also included in these four technical reports is a description of the key assumptions, parameters and methods used to estimate mineral reserves and resources and a general discussion of the extent to which the estimates may be affected by any known environmental, permitting, legal, title, taxation, socio-political, marketing or other relevant factors. Information regarding data verification, surveys and investigations, quality assurance program and quality control measures and a summary of sample, analytical or testing procedures for the Fire Creek Mine are contained in a technical report prepared for Klondex Mines, dated March 31, 2018; the Hollister Mine dated May 31, 2017, amended August 9, 2017; and the Midas Mine dated August 31, 2014, amended April 2, 2015. Copies of these technical reports are available under Hecla’s and Klondex’s profiles on SEDAR at www.sedar.com. Mr. Allen and Mr. Blair reviewed and verified information regarding drill sampling, data verification of all digitally-collected data, drill surveys and specific gravity determinations relating to the Casa Berardi mine. The review encompassed quality assurance programs and quality control measures including analytical or testing practice, chain-of-custody procedures, sample storage procedures and included independent sample collection and analysis. This review found the information and procedures meet industry standards and are adequate for Mineral Resource and Mineral Reserve estimation and mine planning purposes.

Cautionary Statements Statements made or information provided that are not historical facts are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 and “forward-looking information” within the meaning of Canadian securities laws. Words such as “may”, “will”, “should”, “expects”, “intends”, “projects”, “believes”, “estimates”, “targets”, “anticipates” and similar expressions are used to identify these forward-looking statements. The material factors or assumptions used to develop such forward-looking statements or forward-looking information include that the Company’s plans for development and production will proceed as expected and will not require revision as a result of risks or uncertainties, whether known, unknown or unanticipated, to which the Company’s operations are subject. Forward-looking statements involve a number of risks and uncertainties that could cause actual results to differ materially from those projected, anticipated, expected or implied. These risks and uncertainties include, but are not limited to, metals price volatility, volatility of metals production and costs, litigation, regulatory and environmental risks, operating risks, project development risks, political risks, labor issues, ability to raise financing and exploration risks and results. Refer to the Company’s Form 10K and 10-Q reports for a more detailed discussion of risk factors that may impact expected future results. The Company undertakes no obligation and has no intention of updating forward-looking statements other than as may be required by law.

Company Info

Investor Relations800.HECLA91 (800.432.5291)hmc-info@hecla-mining.com

Public RelationsJeanne DuPont, corp. communications coordinatorT: 208.769.4177

Coeur d’Alene corporate office (HQ)6500 N. Mineral Dr., Suite 200Coeur d’Alene, ID 83815-9408T: 208.769.4100

Vancouver corporate officeSuite 970, 800 W. Pender St.Vancouver, BC, Canada V6C 2V6T: 604.682.6201

Board of DirectorsTed Crumley, chairmanPhillips S. Baker, Jr.Catherine ‘Cassie’ J. BoggsGeorge R. JohnsonGeorge R. Nethercutt, Jr.Stephen F. RalbovskyTerry V. RogersCharles B. Stanley

ManagementPhillips S. Baker, Jr., president and CEOClayr AlexanderCarlos AguiarKurt AllenKeith BlairRobert BrownBrian EricksonAlain GrenierLindsay A. HallEric HillRusty LawlarLauren RobertsLuke RussellKevin ShiellDavid C. Sienko

Analyst Coverage

Michael Jalonen, BofA Merrill LynchMatthew Fields, BofA Merrill Lynch (High Yield) Ryan Thompson, BMO Capital Markets Dalton Baretto, Canaccord Genuity Corp. (Canada)Mike Kozak, Cantor FitzgeraldCosmos Chiu, CIBC World MarketsHeiko Ihle, H.C. Wainwright & Co. Mark Mihaljevic, RBC Capital MarketsTrevor Turnbull, Scotia Capital, Inc.

Nevada Operations – The project is being studied to determine how to mine it profitably with a lower mining cost. Review includes hydrology studies. Agreement reached for third-party processing of refractory ore from a bulk sample. In the meantime, development spending has been stopped and Fire Creek is mining out developed ore. Restarting the exploration program is a priority.

Rock Creek and Montanore – Rock Creek (acquired in 2015) and Montanore (acquired in September 2016) are two large silver/copper deposits in Montana. Rock Creek received a Final environmental impact statement (EIS). The Record of Decision (ROD) for the evaluation phase was issued in August 2018, and the state confirmed its authorization for the evaluation phase activity at site. The U.S. Forest Service is preparing a supplemental EIS statement focusing on the evaluation phase of the Montanore Project and a ROD is anticipated in the first half of 2020.

San Sebastian – San Sebastian is a silver and gold mine in Mexico. A review of sulfide ore is underway, including a bulk sample from the Hugh Zone to test for suitability for sulfide production. This could potentially lead to development and mining this area, which could mean another five or more years of mine life. In addition, the El Toro has good potential to extend the mine life with near-surface oxide material.

KEY GROWTH INITIATIVES

(1) Cash cost, after by-product credits, per silver ounce represents non-U.S. Generally Accepted Accounting Principles (GAAP) measurement; a reconciliation of which to cost of sales and other direct production costs and depreciation, depletion and amortization (GAAP) can be found below.

(2) Realized prices are calculated by dividing gross revenues for each metal by the payable quantities of each metal included in the concentrate and doré sold during the period.

Leading Silver Producer with Strong Cash Margins (Greens Creek, Lucky Friday and San Sebastian)

FINANCIAL HIGHLIGHTS