Gold Resource Corporation announced the continued expansion of the Arista Mine’s Switchback vein system with thirteen additional step-out drill holes. Intercepts include 11.35 meters of 4.19 grams per tonne (g/t) gold, 114 g/t silver and 5.53% zinc; 3.69 meters of 6.82 g/t gold, 225 g/t silver and 3.79% zinc; and 3.16 meters of 4.43 g/t gold, 184 g/t silver and 3.48% zinc. These new results expand the Switchback vein system which includes extending its total strike length to over 900 meters, an increase of 600 meters since January 1, 2017. Gold Resource Corporation is a gold and silver producer, developer and explorer with operations in Oaxaca, Mexico and Nevada, USA. The Company has returned $110 million to shareholders in monthly dividends since commercial production commenced July 1, 2010, and offers shareholders the option to convert their cash dividends into physical gold and silver and take delivery. From an underground exploration drill pad located on level 4 of the Arista Mine’s Arista vein system, drill Hole 517115 targeted the north-west extension of the Switchback vein system. This drill hole intercepted four individual mineralized veins over a 15-meter core length, extending the Switchback vein system’s strike length to the north-west by approximately 200 meters. The Arista Mine’s Switchback vein system remains open in all directions. Hole# 517115, step-out hole extending Switchback strike length by 200 meters to north- west: 0.94m of 2.04 g/t gold, 62 g/t silver, 1.47% copper, 1.78% lead, 3.40% zinc; 1.18m of 0.37 g/t gold, 54 g/t silver, 0.14% copper, 3.09% lead, 8.21% zinc. Seven holes were drilled from an exploration drill pad located on level 22.5 of the Arista Mine’s Switchback vein system. All seven of these step-out drill holes intercepted multiple mineralized veins, confirming up-dip and down-dip continuity of known veins and extending the vertical mineralization within the Switchback vein system. Hole# 517121: 11.35m of 4.19 g/t gold, 114 g/t silver, 0.43% copper, 0.98% lead, 5.53% zinc; incl. 2.38m of 12.30 g/t gold, 299 g/t silver, 0.97% copper, 1.61% lead, 4.29% zinc; 8.98m of 1.40 g/t gold, 53 g/t silver, 0.50% copper, 1.82% lead, 4.85% zinc. Hole# 517122:8.39m of 2.95 g/t gold, 34 g/t silver, 0.33% copper, 0.97% lead, 4.31% zinc; incl. 1.09m of 15.65 g/t gold, 65 g/t silver, 0.73% copper, 4.09% lead, 11.55% zinc. Hole# 517124:13.26m of 0.43 g/t gold, 103 g/t silver, 0.42% copper, 5.43% lead, 5.37% zinc; 1.56m of 14.25 g/t gold, 629 g/t silver, 0.10% copper, 0.67% lead, 3.83% zinc. Holes 517129 and 517130 were drilled from an underground drill station located on level 23 of the Arista Mine’s Switchback vein system, extending the south-east extension of the Switchback mineralization by approximately 100 meters. Hole# 517130: 3.69m of 6.82 g/t gold, 225 g/t silver, 0.26% copper, 0.63% lead, 3.79% zinc; incl. 0.78m of 15.00 g/t gold, 309 g/t silver, 0.25% copper, 0.60% lead, 6.99% zinc. Holes 517131 and 517132 intercepted the Soledad vein from an underground drill station located on level 14 of the Arista Mine’s Arista vein system. Hole# 517131: 3.16m of 4.43 g/t gold, 184 g/t silver, 0.48% copper, 1.51% lead, 3.48% zinc; incl. 1.08m of 9.96 g/t gold, 452 g/t silver, 0.61% copper, 3.01% lead, 7.89% zinc. Hole# 517132: 23.55m of 0.48 g/t gold, 77 g/t silver, 0.70% copper, 0.86% lead, 5.55% zinc; incl. 2.74m of 2.72 g/t gold, 85 g/t silver, 0.81% copper, 2.40% lead, 14.51% zinc.