Bukit Barisan is a mountain range that stretches along the western coast of Sumatra, Indonesia. It runs approximately 1,500 kilometers (about 930 miles) and is known for its rich biodiversity and stunning landscapes. The range is home to several national parks, including Gunung Leuser National Park, which is famous for its wildlife, including orangutans and tigers. The mountains are formed from volcanic activity and are characterized by steep slopes and lush forests. Bukit Barisan plays a crucial role in the local climate, influencing rainfall patterns in the region. It is also significant for agriculture, as the fertile volcanic soil supports various crops, including coffee and rubber.