Udumalai also known as Udumalaipettai is a town in Udumalaipettai taluk of the Tirupur district in the Indian state of Tamil Nadu. Earlier it was under Coimbatore District Indian state of Tamil Nadu. As it is called, Udumalpet town is one of the famous summer resorts of Tamil Nadu, surrounded by Mountains on three sides. Along with Pollachi, it is one of the twin cities separated from Coimbatore. As of 2011, the town had a population of 61,133,
The town is surrounded by hills and has a good weather throughout the year. Waterfalls in Thirumoorthy Hills draw quite a few tourists. It takes half an hour to reach the falls by trekking from the Thirumoorthy Temple. Arjuneswarar Temple is a notable temple and is in Kadathur.
A drive on the Udumalpet - Munnar road (SH 17) gives one unforgettable views of the Western Ghats. Chinnar is 25 km (16 mi) from Udumalpet and along the way one passes through the Indira Gandhi Wildlife Sanctuary and National Park which is famous for the Elephants that inhabit the area. The road to Chinnar crosses the border over the Chinnar River between Tamil Nadu and Kerala. As you enter Kerala, you can see a distinct change in the vegetation upon entering the Chinnar Wildlife Sanctuary. While the Tamil Nadu areas have vegetation dominated by shrubs and thorny trees, the vegetation in Kerala is lush green with tall trees. Marayur is 20 km (12 mi) from Chinnar, famous for its sandalwood forests which often fall prey to poachers.
As you drive past Marayur towards Munnar, you can see Anamudi, the highest mountain peak in south part of India to your right. This area also houses the Eravikulam National Park famous for its population of the Nilgiri Tahr, a mountain goat. This area offers abundant scope for mountain trekking. On the trekking route to the Anamudi peak, you can see a trout farm. The rest of the drive towards Munnar is through neatly manicured tea estates owned by Tata Tea Limited and Waterfall Estate. The landscape is also dotted by tea factories and labour lines.
There is also a trekking route from Amaravathi Dam to Kodaikanal which is frequented by the students of the Sainik School, Amaravathinagar (the only Sainik School in Tamil Nadu). Villages are criss-crossed by Amaravathi River and various irrigation canals. Coconut tree farms are common sight and this area is one of the leading producer of coconuts in the region. The countryside is a popular film shooting spot, providing scenic backgrounds and greenery.The climate is pleasant throughout the year.