For road-trippers, motorcyclists, and wilderness seekers, one mountain circuit in Tamil Nadu stands out for driving excitement and natural isolation: the Kolli Hills (Kolli Malai). Rising abruptly from the Namakkal plains to an altitude of roughly 4,200 feet, this Eastern Ghats mountain range is known for medicinal herbs, fruit groves, and its challenging approach road.

The ascent is famous: a steep climb featuring 70 continuous hairpin bends over just 46 kilometers. From descending more than 1,000 stone steps to reach the foot of the Agaya Gangai Waterfalls to visiting the ancient Arapaleeswarar Temple, here is your practical travel guide to exploring Kolli Hills.

Scenic winding mountain ghat road with tight hairpin turns cutting through forested mountain ridges in Kolli Hills

The 70 continuous hairpin bends of Kolli Hills make it one of India's most thrilling driving corridors.

1. The Drive: Navigating the 70 Hairpin Turns

The climb starts near Kalappanaickenpatti, about 35 km from Namakkal town:

  • The Engineering Feat: Numbered markers from 1 to 70 guide you as the road winds upward. Each bend reveals expanding views across the Cauvery basin below.
  • Road Quality: The asphalt is smooth and well-maintained with clear reflective road markers. Take blind corners in low gear, honk gently, and allow descending transport vehicles right-of-way.
  • Best Timing: Begin your drive between 6:30 AM and 8:00 AM to take advantage of cool morning temperatures and light traffic.


2. Key Attractions in Kolli Hills

Agaya Gangai Waterfalls

Located near the Arapaleeswarar Temple, the Aiyaru River plunges nearly 300 feet down a vertical rock face into a deep forested valley. Reaching the spray pool requires descending approximately 1,195 stone steps carved into the cliff. The climb back up tests your endurance, making good hydration and sturdy footwear essential.

Arapaleeswarar Temple

Dedicated to Lord Shiva and dating back to the Sangam era, this historic granite shrine sits nestled beside mountain streams. Pilgrims visit the sacred temple pond, where fish are protected and fed by visitors as part of long-standing tradition.

Siddha Caves & Botanical Garden

Kolli Hills is home to traditional medicinal plants. The State Botanical Garden in Semmedu features medicinal plant reserves, a rose pavilion, and quiet walking paths.

Landmark Location Base Travel Highlight
70 Hairpin Ghat Section Kalappanaickenpatti to Semmedu Scenic driving route with panoramic valley views
Agaya Gangai Falls Near Arapaleeswarar Temple 300-foot waterfall reached via 1,195 stone steps
Arapaleeswarar Temple Valappurnadu Ancient Sangam-era granite architectural heritage
Seekuparai Viewpoint Near Semmedu Peaceful sunset viewpoint overlooking river gorges
Quiet country road running through silver oak and pepper plantations in the Eastern Ghats

Plantation roads in Kolli Hills are lined with silver oak trees, coffee shrubs, and pepper vines.

3. Forest Honey & Farm Spices

Kolli Hills is celebrated for farm-fresh agricultural goods. Local village markets in Semmedu offer pure forest honey, black pepper, cloves, cardamoms, and seasonal mountain pineapples directly from tribal cultivators.

4. Practical Logistics & Travel Tips

  • Fuel Up Early: Retail fuel pumps on the plateau are sparse. Fill your tank completely at Namakkal or Sendamangalam before starting the climb.
  • Best Season to Travel: The months between October and March provide pleasant mountain breezes, active waterfalls, and clear driving visibility.
  • Accommodations: Options range from simple town lodges in Semmedu to private plantation resorts and eco-homestays. Booking ahead is advised for weekend trips.

For travelers who appreciate unhurried mountain roads, fresh tea breezes, and rich biodiversity, Kolli Hills is an offbeat gem on Tamil Nadu's tourism map.