Mr. Sebastien de Montessus reports

ENDEAVOUR AND RANDGOLD FORM AN EXPLORATION JOINT VENTURE IN COTE D'IVOIRE

Endeavour Mining Corp. and Randgold Resources Ltd. have established a joint venture covering their adjacent Sissedougou and Mankono exploration properties located in the northern region of Cote d'Ivoire.

Sebastien de Montessus, president and chief executive officer, stated: "As the two largest producers in Cote d'Ivoire, with a strong presence in West Africa, both companies welcome the opportunity to increase their co-operation. This JV will allow us to accelerate exploration on our Sissedougou property while we continue to focus our efforts on our 100-per-cent-controlled 80-kilometre corridor along our Ity mine, which our exploration strategic review identified as our highest priority."

Under the terms of the agreement, Randgold and Endeavour will respectively hold a 70-per-cent interest and a 30-per-cent interest in the newly formed joint venture. Randgold will be the joint venture operator and both parties will contribute to the annual exploration budget in accordance with their shareholdings. A $3.8-million exploration campaign has been approved for the remainder of 2017 and 2018.

About the exploration JV properties

The adjacent Sissedougou and Mankono exploration properties are located in the northern region of Cote d'Ivoire, at the contact of the shear zone hosting the Tongon mine and the shear zone hosting the Sissingue project and the Syama mine.

The Sissedougou property was transferred from La Mancha to Endeavour in late 2015. After nearly four years of exploration inactivity, Endeavour reinitiated exploration in 2017 as part of its greenfield program. Sissedougou's potential was confirmed with an initial 3,378-metre drilling program carried out by La Mancha in 2011, as drill results suggested the presence of an 800-metre mineralized structure.

Selected best drill results at Sissedougou, as published by La Mancha in 2012, were (1):

• 34.6 metres at 2.08 grams per tonne gold at 74.6 metres, including 1.0 m at 31.52 g/t Au;
• 18.8 metres at 2.30 g/t Au at 26.1 metres;
• 23.0 metres at 2.14 g/t Au at 112.6 metres, including 2.0 metres at 10.70 g/t Au.

Randgold confirmed the exploration potential of the Mankono property as its trenching program intercepted a mineralized system over a 300-metre wide corridor and one-kilometre strike (2).

Qualified persons

The scientific and technical content of this news release has been reviewed, verified and compiled by Gerard de Hert, EurGeol, senior vice-president of exploration, West Africa, for Endeavour. Mr. de Hert has more than 19 years of mineral exploration and mining experience and is a qualified person as defined by National Instrument 43-101 -- Standards of Disclosure for Mineral Projects.

About Endeavour Mining Corp.

Endeavour operates five mines across Cote d'Ivoire (Agbaou and Ity), Burkina Faso (Karma), Mali (Tabakoto) and Ghana (Nzema), which are expected to produce 600,000 to 640,000 ounces of gold at an all-in sustaining cost (AISC) of $860 (U.S.) to $905 (U.S.) per ounce in 2017. Endeavour's high-quality development projects (Hounde, Ity CIL and Kalana) have the combined potential to deliver an additional 600,000 ounces per year at an AISC well below $700 per ounce between 2018 and 2020. In addition, Endeavour's exploration program aims to discover 10 million to 15 million ounces of gold by 2021, representing more than twice the reserve depletion during the period.

Notes:

1. As published in La Mancha Resources' press release dated Jan. 31, 2012, available on SEDAR;
2. As published in Randgold's third quarter report dated Nov. 2, 2017, available on its website.

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