This hill is located in  Rajnandgaon district in the state of Chhattisgarh.  It is situated about 35kms from  Rajanandan town and 67 kms from Durg. The famous Maa Bamleshwari temple is located at the summit of this hill.

The temple has evolved into a major spiritual centre of Chhattisgarh. There are other important shrines such as the Chotti Bamleshwari temple, the Shivji temple and another temple dedicated to Lord Hanuman.

These temples are revered by lakhs of people of Chhattisgarh who flock around the shrine during the Navratris of Kavar (during Dusshera) and Chaitra (during Ram Navami). There is tradition of lighting Jyoti Kalash during Navaratris here.

Dongar means mountains while Garh means fort. Legend goes that around 2200 years ago, Raja Veersen, a local king, was childless and upon the suggestions of his royal priests performed puja to the gods. Within a year, the queen gave birth to a son whom they named Madansen. Raja Veersen considered this a blessing of Lord Shiva and Parvati and constructed a temple here.

Source:

https://en.wikipedia.org/wiki/Bambleshwari_Temple

http://themindmill.blogspot.in/2014/03/divine-hills-of-dongargarh.html

http://www.flickriver.com/places/India/Chhattisgarh/Dongargarh/search/