The journey from Marthandam to Thiruvananthapuram (Trivandrum) is a 50 km trip across the Tamil Nadu-Kerala border. You can take a bus via NH 66 or a train from the nearby Kuzhithurai station. The drive takes about 1.5 hours depending on border traffic. This is a major inter-state route connecting the southern districts of Tamil Nadu to the capital of Kerala.
Total Distance: 50 km driving distance; 45 km straight-line air distance.
Check the IRCTC app for train timings from Kuzhithurai.
KSRTC buses are frequent and reliable for this border crossing.
September to March, avoiding the heavy monsoon rains.