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 (3.1 mi) long and is about 1.5 kilometres (0.93 mi) wide. Bala fort was originally constructed by Nikumbh Rajputs who were one of ancient rulers in Rajasthan and belongs to suryavanshi clan.