Pachaimalai, also known as the Pachais, are hills which are part of Eastern Ghats

Eastern Ghats

The Eastern Ghats or Eastern Ghauts are a discontinuous range of mountains along India's eastern coast. The Eastern Ghats run from West Bengal state in the north, through Orissa and Andhra Pradesh to Tamil Nadu in the south passing some parts of Karnataka. They are eroded and cut through by the...

 in Tamil Nadu

Tamil Nadu

Tamil Nadu is one of the 28 states of India. Its capital and largest city is Chennai. Tamil Nadu lies in the southernmost part of the Indian Peninsula and is bordered by the union territory of Pondicherry, and the states of Kerala, Karnataka, and Andhra Pradesh...

 in Trichy district. Located near 11.18°N 78.35°E. Pachai in Tamil

Tamil language

Tamil is a Dravidian language spoken predominantly by Tamil people of the Indian subcontinent. It has official status in the Indian state of Tamil Nadu and in the Indian union territory of Pondicherry. Tamil is also an official language of Sri Lanka and Singapore...

 means green. They are much greener than some of the other hills in the vicinity. VeeraRamar Dam is located in these hills on Kallar.

Rivers include Kallar

Kallar River

Kallar is a river flowing in the Vellore district of the Indian state of Tamil Nadu....

 and Sweata Nadi

Sweata Nadi

Sweata Nadi carries the drainages of Pachaimalai and Kolli Hills. It joins with Vasishta Nadi to form Vellar river and flows in to the Bay of Bengal....

. Waterfalls include Mangalam Aruvi, Koraiyar Falls and Mayil Uthu Falls. There are also indigenous tribes, such as the Malayali

Malayali

Malayali is the term used to refer to the native speakers of Malayalam, originating from the Indian state of Kerala...

s, who trade some of their surplus hill produce to the towns below on the plains, trading for items not available in the hills. Jackfruit

Jackfruit

The jackfruit is a species of tree in the Artocarpus genus of the mulberry family . It is native to parts of Southern and Southeast Asia. It is the national fruit of Bangladesh, . The jackfruit tree is believed to be indigenous to the southwestern rain forests of India...

 is one a popular seasonal agriculture produce from this area.

Towns in the area include:
Thuraiyur

Thuraiyur

Thuraiyur is a town and a municipality in Tiruchirappalli district in the Indian state of Tamil Nadu. Thuraiyur Municipality - It was upgraded to III Grade Municipality from Town Panchayat on 17.01.1970. It was upgraded to II Grade Municipality in May 1998.- Economy :Two decades ago agriculture...

, Esanai

Esanai

Esanai is an idyllic village 50 miles northeast of Trichy, in far southern India, coming under the Sendurai taluk in Perambalur district of Tamil Nadu state. It is known mainly for its temple to Ayyappan, which is visited by thousands of people from India and abroad. The main economy of the...

, Elambalur

Elambalur

Elambalur is the nearest village to Perambalur and to NH45 road . It is a special village in Perambalur district, Tamilnadu, India...

, Perambalur

Perambalur

Perambalur is a district headquarters and a taluk and municipality in the Indian state of Tamil Nadu. Perambalur District came in to existence after trifurcation of Tiruchirappalli district with effect from 30.09.1995.- Geography :...

, Gangavalli

Gangavalli

Gangavalli is a panchayat town in Salem district in the state of Tamil Nadu, India.-Geography:Gangavalli is located at . It has an average elevation of 292 metres .-History:...

, Thammampatti

Thammampatti

Thammampatti is a Town Panchayat in Gangavalli taluk of Salem district in the state of Tamil Nadu Thammampatti is situated between Pachamalai and the Kolli Hills...

, Arumbavur

Arumbavur

Arumbavur is a panchayat town in Perambalur district in the state of Tamil Nadu, India.-Geography:Arumbavur is located at . It has an average elevation of .senthil-Demographics:...

, Malayalappatti, Thedavur

Thedavur

Thedavur is a panchayat town in Salem district in the Indian state of Tamil Nadu.-History:Around 1200 CE, there were 2 major forces ruling in the neighborhood, Aragalur ruled by Ponparappinan and Thedavur by Vanakkovaraiyars....

 and Uppiliapuram

Uppiliapuram

Uppiliapuram is a panchayat town in Tiruchirappalli district in the Indian state of Tamil Nadu.-Geography:Uppiliyapuram is located at . It has an average elevation of .-Demographics:...

.

Districts covered are
Tiruchirappalli district

Tiruchirappalli district

Tiruchirapalli District , also known as Tiruchchirapalli District or Trichy District, is located along the Kaveri River in Tamil Nadu, India...

, Salem District

Salem District

Salem District is a district of Tamil Nadu state in southern India. The city of Salem is the district headquarters. Other major towns in the district are Mettur, Omalur and Attur...

 and Perambalur district.