Starting one-hour south of Kutacane, this five- to six-day trek through tough terrain passes over 20 river crossings; in the wet season it could take up to 10 days and can be a real slog. You have a good chance of seeing orang-utans and gibbons, and the trek passes through areas that elephants are known to inhabit.

You can arrange to have your luggage delivered to Bukit Lawang separately.