"The first closed beta is planned to launch at the earliest Q1 2014," the studio posted in a recent Ask the Devs segment. "We are ensuring quality when it's ready to meet the public eye. All players who have registered prior will have a high chance of receiving first round of beta codes via their email."
Black Gold's beta and release is initially aimed at North America, although Snail Games said it is "not ruling out" the possibility of future releases elsewhere. There will also be no region block for the title.
[Thanks to Dengar for the tip!]