The bus station is about a 15 minute tuk tuk ride from the old center of town. The tuk tuk ride will run you anywhere from a 80 to 150 baht depending on time of day and how much you want to negotiate. VIP buses go back and forth from Chiang Mai and Chiang Rai throughout the day. There are two bus stations in Chiang Rai, and the VIP buses go to the old bus station which is right in the centre of town adjacent to the night bazaar.