DENVER—A jury said May 7 that two women are guilty of trespassing for refusing to leave the Denver clerk’s office when they were denied a marriage license.

Kate Burns and Sheila Schroeder were seeking to draw attention to a state law that defined marriage in Colorado as the union of a man and a woman. The incident occurred in September.

A jury of six women deliberated for less than an hour before returning a verdict.

The couple will have to pay $41 in court costs and perform 28 hours of community service.