By Rail: Trains depart from Hua Lumpong (Bangkok's Railway Station), Visitors to Thailand can reach there easily by MRTA Subway, to anywhere around the kingdom of Thailand daily. It has several classes for you to ticket, call 1690 for more information or visit website
By Private Car: From Bangkok driving along national highway #1 (Phahol Yothin Road). Then turn to highway #32 (Asia Route) at Wang Noi district of Phra Na Khon Si Ayuddhaya province driving through Ang Thong province, Nakhon Sa Wan province respectively. After that alter to use highway #117 going ahead to Phitsanulok province. Then turn to drive highway #11 so far as passing Lampang and Lampoon provinces from there reaching Chiang Mai. Total distance is 695 kilometers. By the way, you can drive another route from Nakhon Sa Wan province by still gearing the highway #1 then passing Kamphaeng Phet, Tak, Lampang and lastly Lampoon provinces from there you will reach to Chaing Mai. This route estimates 696 kilometers.