The Ping River along with the Nan River

Nan River

The Nan River is a river in Thailand. It is one of the most important tributaries of the Chao Phraya River.-Geography:The Nan River originates in Nan Province. The provinces along the river after Nan Province are Uttaradit, Phitsanulok and Phichit. The Yom River joins the Nan River at Chum Saeng...

, is one of the two main contributaries of Chao Phraya River

Chao Phraya River

The Chao Phraya is a major river in Thailand, with its low alluvial plain forming the centre of the country. It runs through Bangkok, the capital city, and then empties into the Gulf of Thailand.-Etymology:...

. It originates at Doi Chiang Dao in Chiang Dao district

Amphoe Chiang Dao

Chiang Dao is a district of Chiang Mai Province in northern Thailand. It is nicknamed "Little Tuscany" and there are actually a few local wines produced in the area.-Geography:...

, Chiang Mai Province

Chiang Mai Province

Chiang Mai is the second-largest province of Thailand, located in the north of the country. Neighboring provinces are Chiang Rai, Lampang, Lamphun, Tak, and Mae Hong Son. In the north it borders Shan State of Burma...

. After passing Chiang Mai town

Chiang Mai

Chiang Mai sometimes written as "Chiengmai" or "Chiangmai", is the largest and most culturally significant city in northern Thailand. It is the capital of Chiang Mai Province , a former capital of the Kingdom of Lanna and was the tributary Kingdom of Chiang Mai from 1774 until 1939. It is...

, it flows though the provinces Lamphun

Lamphun Province

Lamphun is one of the northern provinces of Thailand. Neighboring provinces are Chiang Mai, Lampang and Tak.-Geography:Lamphun is located in the river valley of the Ping River, surrounded by mountain chains....

, Tak

Tak Province

Tak is one of the northern provinces of Thailand. Neighboring provinces are Mae Hong Son, Chiang Mai, Lamphun, Lampang, Sukhothai, Kamphaeng Phet, Nakhon Sawan, Uthai Thani and Kanchanaburi...

, and Kamphaeng Phet

Kamphaeng Phet Province

Kamphaeng Phet is one of the provinces of Thailand, located in the north of the country. Neighboring provinces are Sukhothai, Phitsanulok, Phichit, Nakhon Sawan and Tak.- Etymology :...

. At the confluence with the Nan River

Nan River

The Nan River is a river in Thailand. It is one of the most important tributaries of the Chao Phraya River.-Geography:The Nan River originates in Nan Province. The provinces along the river after Nan Province are Uttaradit, Phitsanulok and Phichit. The Yom River joins the Nan River at Chum Saeng...

 at Nakhon Sawan

Nakhon Sawan

Nakhon Sawan is a city in Thailand, the name literally means "Heavenly City". The city is the capital of Nakhon Sawan Province, and covers the complete subdistrict Pak Nam Pho and parts of Khwae Yai, Nakhon Sawan Tok, Nakhon Sawan Ok and Wat Sai, all of Mueang Nakhon Sawan district...

 (also named Paknam Pho in Thai) it forms the Chao Phraya River

Chao Phraya River

The Chao Phraya is a major river in Thailand, with its low alluvial plain forming the centre of the country. It runs through Bangkok, the capital city, and then empties into the Gulf of Thailand.-Etymology:...

.

Tributaries

The principal tributary of the Ping is the Wang River

Wang River

The Wang River is a river in northern Thailand.-Geography:The Wang River is altogether 335nsnp;km long. Its waters flow from north to south. One of the principal settlements along the river is Lampang, which is situated on the north bank of a curve in the river. From Lampang, the river extends...

.

Ping Basin

The Ping Basin is one of the largest drainage basins of the Chao Phraya Watershed

Chao Phraya River

The Chao Phraya is a major river in Thailand, with its low alluvial plain forming the centre of the country. It runs through Bangkok, the capital city, and then empties into the Gulf of Thailand.-Etymology:...

, draining 33,896 km² of land area.

Greater Ping Basin

The greater Ping Basin, i.e. the basin of the entire Ping river system including its tributary the Wang River

Wang River

The Wang River is a river in northern Thailand.-Geography:The Wang River is altogether 335nsnp;km long. Its waters flow from north to south. One of the principal settlements along the river is Lampang, which is situated on the north bank of a curve in the river. From Lampang, the river extends...

drains a total of 44,688 km² of land area.