Asahan River is a large natural stream of water that flows along 150 kilometers (93 mi) from Lake Toba to Nibung Bay in the Malacca Strait. The river starts from the Sigura-gura dam in Toba Samosir. To see it on the map, click here.
Asahan River is the main outflow of Lake Toba and a famous location of international rafting activities. The flow reaches 120 cubic meters (4,238 cubic ft) per second. The river complex characteristics and swift currents have made it qualified for world-class rafting. The river is a regular venue for international rafting events such as the Asahan Whitewater Festival (AWF). The AWF course runs for 22 kilometers (13.7 mi). It starts right in front of the Sigura-gura dam and ends at the town of Bandar Pulau.
What to Expect
The rafting course consists of four sections with varying characteristics and difficulties. Just off the floodgate of Sigura-gura Dam all the way to the Parhitean Bridge, the ‘Never-Ever-Ends’ is the first part of the course. It offers an endless 3.5 kilometers (2.2 mi) or 20 minutes of an endless thrill of interconnected lines with difficulty grades measuring at 4 to 5. Here, the challenge prevents rafters from even adjusting their seats along the course.
The second section or the ‘Hula-Huli Run’ starts from the Parhitean Bridge and ends at the Hula-Huli Village. The 2.5 kilometer (1.6 mi) course has grade difficulty of 3 to 4 and is considered a fair course, nevertheless, still not advisable for beginners.
The third section is known to be the most challenging part of the entire course. With some of the most challenging rapids and difficulty grade reaching to 5 plus, this section of the river is called ‘The Nightmare.’ To conquer this part, aside from years of experience and more than good skills, it takes a whole lot of nerves and mental readiness.
The final section is known as the ‘Halim Run’ and is considered the easiest and safest part. Beginners and ordinary tourists can enjoy here the relatively easy whitewater rafting that usually lasts for 3.5 hours.