Exhibit 99.1

Press Release

HALLADOR ENERGY COMPANY REPORTS FIRST QUARTER 2020

FINANCIAL AND OPERATING RESULTS

Proactive steps taken to enhance liquidity, protect employee health, and ensure supply to the nation's critical infrastructure.

Terre Haute, Ind., May 11, 2020 – Hallador Energy Company (NASDAQ – HNRG) today reported a net loss of $3.7 Million, ($0.12) Per Share. 

Brent Bilsland, President and Chief Executive Officer, stated, "Thermal export prices collapsed in the 2nd half of 2019, pressuring domestic steam coal pricing.  Natural gas prices marked their lowest levels in 21 years during Q1 2020.  Additionally, most of the United States and developed world closed and sheltered in place for 8-10 weeks during part of the 1st and 2nd quarter. The culmination of these extreme events led us to take proactive steps to plan for the future of Hallador's customers, investors, and employees.  Our actions are designed to increase our financial abilities so that we can ensure consistency at a time when the world is experiencing great volatility."

In anticipation of shipment delays and potential production interruptions, Hallador has:

Solid Sales Position Through 2022

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* Contracted tons are subject to adjustment due to the exercise of customer options to either take additional tons or reduce tonnage if such options exist in the customer contract. 

The table below represents some of our critical metrics (in thousands except for per ton data):

EBITDA, adjusted EBITDA, and adjusted free cash flow should not be considered alternatives to net income, income from operations, cash flows from operating activities or any other measure of financial performance presented in accordance with GAAP.  Our method of computing EBITDA, adjusted EBITDA, and adjusted free cash flow may not be the same method used to compute similar measures reported by other companies.

Management believes that the presentation of such additional financial measures provides useful information to investors regarding our performance and results of operations because these measures when used in conjunction with related GAAP financial measures, (i) provide additional information about our core operating performance and ability to generate and distribute cash flow, (ii) provide investors with the financial and analytical framework upon which management bases financial, operation, compensation, and planning decisions, and (iii) present measurements that investors, rating agencies, and debt holders have indicated are useful in assessing our results.

Reconciliation of GAAP "net income" to non-GAAP "adjusted EBITDA" (in thousands).

Reconciliation of GAAP "net income" to non-GAAP "adjusted free cash flow" (in thousands).

Conference Call

As previously announced, our earnings conference call for financial analysts and investors will be held on Tuesday, May 12, 2020, at 2:00 pm eastern time.  Dial-in numbers for the live conference call are as follows:

Toll-free (888) 347-5317

Canadian Callers Toll-free (855) 669-9657

Conference ID #: Hallador Energy Company HNRG Call

An audio replay of the conference call will be available for one week. To access the audio replay, dial US Toll-Free (877) 344-7529; Canada Toll-Free (855) 669-9658 and request to be connected to replay access code 10138493.

Hallador is headquartered in Terre Haute, Indiana, and through its wholly owned subsidiary, Sunrise Coal, LLC, produces coal in the Illinois Basin for the electric power generation industry. To learn more about Hallador or Sunrise, visit our website at www.halladorenergy.com.

Contact – Investor Relations

Phone – (303) 839-5504