The train service between Karalar and Mersin is primarily operated by the Turkish State Railways with a focus on regional connectivity. The main train type serving this route is the Yüksek Hızlı Tren (High-Speed Train), which reaches speeds of up to 250 km/h (155 mph) on selected sections. The travel time from Karalar to Mersin is approximately 1 hour and 50 minutes, making it a relatively swift option for this journey.
While the service is efficient, it is important to note that not all segments of the route are covered by high-speed trains. In some instances, local regional trains may also run between these stations, offering a slower option with journey times exceeding 2 hours, depending on stops along the way. However, the high-speed service typically provides a direct connection with fewer stops, making it an attractive choice for those looking to minimize travel time. Passengers can enjoy standard amenities such as comfortable seating and onboard refreshments, making the journey pleasant.