A fire started in a forested area of Uludağ Mountain in the northwestern province of Bursa yesterday at around 11 p.m., private broadcaster NTV reported on its website.
Firefighters have not yet been able to fully contain the fire, the report said, adding that darkness and wind hampered firefighting efforts.
Officials said the secluded nature of the area was making it hard for firefighters and vehicles to reach the flames.
Fire on lower elevations was contained this morning, authorities said, noting that no air support was needed.
About 40 hectares have been reportedly damaged during the fire.
Uludağ is known as the most popular winter tourism spot in Turkey, hosting thousands of visitors every year.