Thenmala Dam is a scenic gravity dam built across the Kallada River in Kollam district, Kerala. It is part of the Thenmala Ecotourism Project, one of the first planned ecotourism destinations in India. The dam creates a large and beautiful reservoir surrounded by dense forests of the Western Ghats, offering breathtaking views, boating, and adventure activities.
Thenmala is popular for its calm environment, eco-friendly tourism initiatives, and as a refreshing getaway from the plains of Kollam and Thiruvananthapuram.

Thenmala Dam Location
- Address: Thenmala Dam, Thenmala, Kollam District, Kerala — 691308
- Pin Code: 691308
- Administrative Zone: Thenmala, Kollam District, Kerala
| Reference Point | Distance |
| Kollam City | 60–65 km |
| Thiruvananthapuram | 75–80 km |
| Punalur | 20–25 km |
| Sengottai | 35–40 km |
| Trivandrum International Airport | 85–90 km |
Timings and Entry Fee of Thenmala Dam
| Activity | Timings | Entry / Activity Fee |
| Dam & Ecotourism Zone | 8:00 AM to 6:00 PM (all days) | ₹20 – ₹50 per person |
| Boating (Reservoir) | 9:00 AM to 5:00 PM | ₹150 – ₹500 (depending on boat type) |
| Adventure Activities (Trekking, Zip-lining, etc.) | As per schedule | Separate charges |
| Vehicle Parking | During visiting hours | Nominal charges |
Note: Entry fee includes access to the eco-park area. Adventure activities have additional costs.
How to Reach Thenmala Dam
- From Kollam: 60–65 km drive (1.5–2 hours).
- From Thiruvananthapuram: 75–80 km.
- By Bus: KSRTC/private buses from Kollam or Punalur to Thenmala.
- By Cab: Most convenient and scenic option.
- By Train: Nearest station is Punalur or Sengottai, then taxi.
Best Time to Visit of Thenmala Dam
| Season | Months | Experience |
| Peak Season | September to March | Pleasant weather, ideal for boating & trekking |
| Post-Monsoon | September–November | Lush greenery and full reservoir |
| Winter | December to February | Cool climate, best for outdoor activities |
| Monsoon | June to August | Dramatic misty views (roads can be slippery) |
The best time is September to February, when the weather is pleasant and the surroundings are lush.
Nearby Places to Visit of Thenmala Dam
| Place | Distance | Description |
| Thenmala Ecotourism Zone | Adjacent | Rope bridge, butterfly park & trekking trails |
| Palaruvi Waterfall | 15–20 km | Beautiful waterfall with natural pool |
| Kulathuppuzha | 25–30 km | Famous Sastha Temple and river |
| Punalur | 20–25 km | Town known for suspension bridge |
| Kollam Backwaters | 60–65 km | Scenic backwater destinations |
In conclsuion, Thenmala Dam is a perfect blend of nature, adventure, and tranquility in southern Kerala. Surrounded by the Western Ghats, it offers a refreshing experience for families and nature enthusiasts. Combine your visit with the Thenmala Ecotourism Zone and nearby Palaruvi Waterfall for a memorable day trip. Best enjoyed during the cooler months!
Frequently Asked Questions (FAQs)
Q1. Where is Thenmala Dam located?
A: Thenmala Dam is located in Thenmala, about 60–65 km from Kollam city and 75–80 km from Thiruvananthapuram.
Q2. What are the timings of Thenmala Dam?
A: The ecotourism zone and dam area are open from 8:00 AM to 6:00 PM daily.
Q3. What is the entry fee at Thenmala Dam?
A: Entry fee is around ₹20–₹50 per person. Boating and adventure activities have separate charges.
Q4. What is the best time to visit Thenmala Dam?
A: September to February is ideal for pleasant weather and outdoor activities.
Q5. Is boating available at Thenmala Dam?
A: Yes, reservoir boating is one of the major attractions here.










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