
Chiang Mai valley is 310 meters (1,027 feet) above sea level. The widest point of the province measures 136 kms. (85 miles), and the longest 320 kms. (200 miles). To the north, a 277 kms. (141.82 miles) stretch of mountains divides Chiang Mai's northern districts of Fang and Mae Ai from Myanmar's (Burma) Chiang Tung (Shan) State.
In certain areas, the Kok River also acts as a border between Chiang Mai and Myanmar. On the east, Chiang Mai is bordered by the Chiang Rai, Lampang, and Lamphun provinces.
The Mae Tuen River, Ream Mountain, and Luang Mountain separate Chiang Mai's South from the province of Tak. Some portions of Chiang Mai's South also border the Lamphun province. To the west, Chiang Mai is bordered by Mae Hong Son province.