| Avalanchi | |
| Native Name: | "Avalanche OR Avilanji" |
| Native Name Lang: | Tamil |
| Settlement Type: | Village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 11.31°N 76.62°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Nilgiris |
| Unit Pref: | Metric |
| Elevation M: | 2401 |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 643*** |
| Area Code Type: | Telephone code |
| Area Code: | 04262 |
| Registration Plate: | TN-43 |
Avalanchi is a village at taluk in Nilgiris district in the Indian state of Tamil Nadu. It is said that Avalanchi gets its name from, The word may conjure up the image of disaster, but Avalanche (pronounced Avalanchi by locals) is a gorgeous little spot in the hills, its rolling meadows and winding paths full of bright rhododendrons, magnificent magnolias and delicate orchids.This pristine valley, about 26 km from Udhagamandalam, gets its name from a massive landslide that took place here more than 150 years ago.
Kundah Power House 5 is located at Avalanche, 18 km from Kundah. There are 2 units and the installed capacity of the power house is 40MW. The water source for the power house is Western Catchment Dam 1 and Upper Bhavani Dam and its Forebay Capacity is 700 Cusec.
Trout fishing can be enjoyed in this lake by making use of the fishing rods and other important equipment. The Trout Farm near the Avalanche Dam is famous for trout fishes, which breeds in unpolluted water.
Avalanchi is linked by Nilgiri Ghat Roads.