Cha-chu or hot sulphur springs at Ralang & Borong are traditional winter spas where visitors spend a week or more soaking in these springs that have medicinal properties. Ralang Cha-chu can be reached after a 1 hr downhill walk to the Rangit valley from the Ralang monastery. Borong Cha-chu is a 7 km drive from Ralang and a further 45-minute downhill walk. Both these hot springs are located along the banks of the river Rangit and can be visited from December to February. For overnight stays temporary huts are available at nominal rates but all bedding and cooking utensils have to be carried along. During the hot spring season, small shops selling basic vegetables & provisions are setup and the local villagers sell dairy products.