The Western Writers of America have posted a contest call for "Tweet Us a Western". They're looking for Western stories of 280 characters. Your stories can be Old West, Modern Westerns, Weird Westerns, or Romance. You have to privately PM the message not post directly to their Twitter feed. Opening date is tomorrow September 1, 2017 and runs to November 30, 2017. Prizes are $300, $125, and $75. You can find all the details here.
Hat tip to Brian Lindenmuth for the link!