Gold Resource Corporation announced the most significant expansion of its Switchback vein system to date with a greater than 200 meter step-out drill intercept at the Aguila Project's Arista mine. From an underground exploration drill pad located on level 14 of the Arista Mine's Arista vein system, a drill hole targeting a greater than 200 meter step-out on the Switchback vein system intercepted multiple high-grade veins. At least six (6) veins were intercepted in Hole 516147, significantly extending the Switchback vein system mineralization to the northwest and extending the system from approximately 300 meters of strike length to now over 500 meters of strike. The Switchback vein system remains open in all directions.