VANCOUVER, British Columbia, Oct. 18, 2018 — Alio Gold Inc (TSX, NYSE AMERICAN: ALO) (“Alio Gold” or the “Company”), or the “Company”), today announced an updated Mineral Resource Estimate for its Florida Canyon Mine in
Nevada, USA prepared in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects. A Technical Report will be filed on SEDAR at http://www.sedar.com and on the Company’s website at http://www.aliogold.com on or before
November 29, 2018 and will supersede the previous Mineral Resource Estimate contained in a Preliminary Economic Assessment dated June 22, 2016 (the “PEA”).