The Gate of Trajan or Trajan's Gate (Bulgarian: Траянови врата, romanized: Trayanovi vrata) is a historic mountain pass near Ihtiman, Bulgaria. In antiquity, the pass was called Succi. Later it was named after Roman EmperorTrajan, on whose order a fortress by the name of Stipon was constructed on the hill over the pass, as a symbolic border between the provinces of Thrace and Macedonia.
Today, a tunnel of Trakiya motorway similarly known as the Gate of Trajan Tunnel (тунел „Траянови врата“) is near the fortress, 55 kilometres (34 mi) from Sofia.