4-5 hours journey to Sigiriya From Colombo by tuk tuk
If you need to enjoy Sri Lanka's special tuk tuk experience you can have it in a cheaer rate (LKR30/km - for round trips). You can find lot of tuk tuks (Threewheelers) and you can ask to hire it for your journey. You should ask for the price before you start the journey. Almost all the drivers are very friendly.
No need to book in advance. Plenty of tuk tuks available on the road.
Keep your belongings with you all the time as the tuk tuks are open vehicles