Siddhagad or Sidgad Fort is situated 16 km southeast of Murbad in Raigad District
. Siddhagad Fort is divided into lower and upper fort. The lower fort is about 1,400 ft above sea level and the upper fort is about 3235 ft above sea level. The fort is hard to climb and it takes at least three hours of hard walking to reach the principal 'Darwaza' (door).
Within the fort, there is an ancient temple of Goddess Shri Namrata Devi and a dilapidated shrine of Lord Shiva. A memorial dedicated to the freedom fighter Bhai Kotwal is located at the opposite end of the fort. A few natural water springs are near the fort.