The Diana-Trial is a group 3 flat horse race in Germany, open to three-year-old thoroughbred fillies.
The race downgrade to Group 3 in 2022 The event serves as a trial for the Preis der Diana.
It was formerly named after the joint winners of that race in 1984, Las Vegas and Slenderella.
It was given Group 3 status in 2004, and from this point it was run at Cologne as the Schwarzgold-Rennen.
The last winner of the race to achieve victory in the Preis der Diana was Iota in 2005.