Any idea what is the longest train route in India in terms of distance covered? I mean, the whole journey must be completed by a single train (from the source to the destination) and there should not be any change of trains involved. My longest ever train journey was the one from Guwahati to Jammu Tawi by Amarnath Express (Train Number 15653). The total distance covered was 2400+ kilometers and the duration of the journey was close to 50 hours. It was a great experience and we had lots of fun. Since then I have been a fan of long distance train journeys. By the way, what's the longest train journey (without any breaks) you have done in your life-time?