What is the best way to get to Sigiriya from Colombo.

Hiring a private driver is overwhelmingly the best most efficient option. There is absolutely no direct train line connecting Colombo to Sigiriya. If you take the train you must disembark at Habarana or Dambulla and negotiate a separate tuk tuk for the final leg which is highly frustrating with heavy luggage. A private air conditioned car hired through an agency or the PickMe app takes roughly four hours driving directly door to door providing a perfectly seamless comfortable journey.