Tynrok was a planet in the space of the galaxy's Alpha or Beta Quadrants, located in proximity to the Klingon Empire-Federation border. In 2376, Admiral Leonard McCoy traveled to Tynrok, where he was joined by Klingon physician B'Oraq, who was to escort him to a medical conference on Qo'noS. (TNG - The Brave and the Bold, Book Two novella: The Final Artifact)