Ambala is a major railway junction 350 kilometers from Haldwani. You can reach it by bus via Dehradun or by taking a train from Kathgodam to Delhi and then a connecting train to Ambala. The road journey takes about 9 hours through the plains of Haryana.
Total Distance: 350 km by road, 270 km air distance.
Check for direct buses at the Haldwani ISBT.
October to March.