Planning an orangutan trekking adventure in Sumatra? One of the first questions you may have is: when is the best time to visit Bukit Lawang? Bukit Lawang sits on the edge of Gunung Leuser National Park in North Sumatra, surrounded by tropical rainforest that stays warm, green and humid throughout the year. This means there isn't one single perfect month to visit. Instead, the best time depends on the experience you want — easier trekking conditions, fewer visitors, a longer jungle expedition...