Bala Quila also known Alwar Fort is a fort in Alwar in Indian state of Rajasthan. It is situated on a hill in the Aravalli Range, above the town of Alwar. The fort is 5 kilometres long and is about 1.5 kilometres wide. Bala fort was originally constructed by Nikumbh Rajputs who were one of ancient rulers in Rajasthan and belongs to suryavanshi clan.