Pachaimalai Hills

Pachaimalai, (Tamil : பச்சைமலை) also known as the Pachais, are hills which are part of Eastern Ghats in Tamil Nadu in Trichy district. Located near . Pachai in Tamil 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 and Sweata Nadi. Waterfalls include Mangalam Aruvi, Koraiyar Falls and Mayil Uthu Falls. There are also indigenous tribes, such as the Malayalis, who trade some of their surplus hill produce to the towns below on the plains, trading for items not available in the hills. Jackfruit is one a popular seasonal agriculture produce from this area.

Towns in the area include: Thuraiyur, Esanai, Elambalur, Perambalur, Gangavalli, Thammampatti, Arumbavur, Malayalappatti, Thedavur and Uppiliapuram.

Districts covered are Tiruchirappalli district, Salem District and Perambalur district.