U.S. Geothermal Inc. to Present at Upcoming Conferences on May 27, May 28, and June 2

BOISE, IDAHO--(Marketwired - May 21, 2015) - U.S. Geothermal Inc. (NYSE MKT: HTM)GTH, a leading renewable energy company focused on the development, production, and sale of electricity from geothermal energy, will be presenting at three institutional investor conferences in the next two weeks.

The Company is pleased to announce that Doug Glaspey, President and COO will be a featured presenter at the 2015 Marcum MicroCap Conference on Wednesday, May 27, 2015 in New York City at the Grand Hyatt Hotel. Additional information about the conference can be obtained at www.marcumllp.com.

The Company's presentation is scheduled to begin at 1:00 p.m. ET and a webcast of the presentation will be available for replay for up to 90 days using the following link http://wsw.com/webcast/marcum2/htm or on the home page of our corporate website www.usgeothermal.com.

The annual Marcum MicroCap Conference is a showcase for public companies with less than $500 million in market capitalization and is a forum where these select companies can network with the investment community. The conference features presentations from six principal industry sectors and provides investors with the opportunity to meet with management of these companies on a one-on-one basis. The Marcum MicroCap Conference attracts fund managers and high net worth investors focusing on small cap equities. Over 2,000 participants attend each year, including senior management, finance and legal executives, venture and lower middle-market private equity investors, institutional investors, directors, investment bankers, buy- and sell-side analysts, and service providers to the microcap marketplace.

Additionally, Mr. Glaspey will be attending one on one meetings with Investors at the 2015 Cowen - Technology, Media & Telecom Conference on Thursday, May 28, 2015 in New York City at the New York Palace Hotel. Additional information about the conference can be obtained at www.cowen.com.

Cowen Group, Inc. is a diversified financial services firm and, together with its consolidated subsidiaries, provides alternative investment management, investment banking, research, and sales and trading services through its two business segments: Ramius LLC and its affiliate's makes up the company's alternative investment management segment, while Cowen and Company, LLC is its broker-dealer segment.

The Company is also pleased to announce that Jonathan Zurkoff, Executive Vice President Finance and Treasurer, will be a featured presenter at the 2015 LD Micro Conference in Los Angeles on June 2, 2015 at the Luxe Hotel. The Company's presentation is scheduled to begin at 2:30 p.m. Additional information about the conference can be obtained at LD Micro's website www.ldmicro.com.

The LD Micro conference is a three day conference presenting over 250 MicroCap companies to an anticipated audience of over 1,400 attendees. The conference highlights exciting growth companies primarily to institutional investors focused on the MicroCap sector. LD Micro is an internet-based financial newsletter that provides self-directed investors information on selected public companies that in the opinion of LD Micro have great investment potential.

About U.S. Geothermal Inc.:

U.S. Geothermal Inc. is a leading and profitable renewable energy company focused on the development, production and sale of electricity from geothermal energy. The company is currently operating geothermal power projects Neal Hot Springs, Oregon, San Emidio, Nevada and Raft River, Idaho for a total power generation of approximately 45 MWs. The company is also developing projects at: the Geysers, California; a second phase project at San Emidio, Nevada; the El Ceibillo project located near Guatemala City, Guatemala; and at Crescent Valley, Nevada. U.S. Geothermal's growth strategy is to reach 200 MWs of generation by 2020 through a combination of internal development and strategic acquisitions.

The information provided in this news release may contain forward-looking statements within the definition of the Safe Harbor provisions of the US Private Securities Litigation Reform Act of 1995. Readers are cautioned to review the risk factors identified by the company in its filings with US and Canadian securities agencies. All statements, other than statements of historical fact, included herein, without limitation, statements relating to the future operating or financial performance of U.S. Geothermal, are forward-looking statements. Forward-looking statements are frequently, but not always, identified by words such as "expects", "anticipates", "believes", "intends", "estimates", "potential", "possible", and similar expressions, or statements that events, conditions, or results "will", "may", "could", or "should" occur or be achieved. These forward-looking statements may include statements regarding perceived merit of properties; interpretation of the results of well tests; project development; resource megawatt capacity; capital expenditures; timelines; strategic plans; or other statements that are not statements of fact. Forward-looking statements involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from U.S. Geothermal's expectations include the uncertainties involving the availability of financing in the debt and capital markets; uncertainties involved in the interpretation of results of well tests; the need for cooperation of government agencies in the development and operation of properties; the need to obtain permits and governmental approvals; risks of construction; unexpected cost increases, which could include significant increases in estimated capital and operating costs; and other risks and uncertainties disclosed in U.S. Geothermal's Annual Report on Form 10-K for the year ended December 31, 2014 filed with the United States Securities and Exchange Commission and Canadian securities regulatory authorities and in other U.S. Geothermal reports and documents filed with applicable securities regulatory authorities from time to time. Forward-looking statements are based on management's expectations, beliefs and opinions on the date the statements are made. U.S. Geothermal Inc. assumes no obligation to update forward-looking statements if management's expectations, beliefs, or opinions, or other factors, should change.

The NYSE MKT and the TSX do not accept responsibility for the adequacy of this release.

FOR FURTHER INFORMATION PLEASE CONTACT:
U.S. Geothermal Inc.
Saf Dhillon
Investor Relations
866-687-7059
208-424-1030 (FAX)
saf@usgeothermal.com
www.usgeothermal.com