Gahar is located beside the Oshtorankouh massif in Zagross range in the province of Lorestan.It is 2360m above the sea level,1700m long and 500m wide. Depth of the lake is 28m maximum.

Gahar lake is among the best sample of lakes that has been appeared due to the landslide.This lake has been located among Oshtorankooh mountain chain and has a much similarity to glacial lakes from appearance aspect. The lake has 2/5km length and 500m wide, and it is feeded from rills and springs flowing from an adjutant highland. The big sliding mass has locked a big valley mouth and caused one natural dam, which the water gradual aggregation behind this dam has caused a lake.

This lake is access able through Dorood and Aligoodarz cities and it’s access route is one of the most beautiful of the state civil walk side routes.The thousands persons visit from this lake annually and they remain at it for a few nights, that we can mention to a multiple professional fishermen that are entered to fishering a farmhouse trout of this lake.

Gahar lake is located in the slopes of the Oshtoran Kooh Mountains, is the permanent sweet-water lake of the upper and lower Gahar. This lake obtains its water from melting snows of the mountains, thus forming into a lake behind the mountains. The length of the main lake being 1.5 km and the average breadth 600 m. The area it is recorded approximately 100 hectares. A variety of flora and fauna can be observed here, turning the surrounding area of the lake into a wonderful park.

There are two lakes within 100 meters of each other named the Upper Gahar and the Lower Gahar on the southern summit of Mount Ashtaran in Lorestan province. The lower lake is the larger of the two and its altitude is 1,600 meters (5,250 feet) lower than the other. The Upper Gahar Lake is situated at an altitude of 2,300 meters (7,545 feet). Altogether, they are 2,100 meters (1.3 miles) long and 355 meters (1,164 feet) wide.

There is no motorway to the lakes and the best way to get there is a climb to Tpaleh Straight from Aligoudarz and from there a hike to the lakes. Although you may alternatively arrive at the lakes from Doroud, if you set out from Aligoudarz, you will pass through a forest and enjoy the scenery. The Gahar Lakes are dubbed “The Jewel of Mount Ashtaran,” and considered as two of Iran’s most stunning lakes.

There is a no hunting or fishing policy in the vicinity of the lakes, since they fall under the Ashtaran Protected Zone. With the exception of their eastern shore, which has a sandy beach, the lakes are not suitable for swimming. The only means of accommodation is a tent erected by campfire.

The climate is generally sub-humid continental with winter precipitation, a lot of which falls as snow. Because it lies on the westernmost slopes of the Zagros Mountains, annual precipitation in Lorestan is among the highest anywhere in Iran south of Alborz Mountains. Temperatures vary widely with the seasons and between day and night. At Khorramabad, summer temperatures typically range from a minimum of 12 °C to a hot maximum of 32 °C. In winter, they range from a minimum of -2 °C to a chilly maximum of 8 °C.