The Trek (2002)

Reports about the discovery of a unique Asian elephant prompts the Kochaban Club, an elephant protection group, and a team of foreign researchers to search for the beast in the wild. But the jungle it inhabits is host to a various dangers, from menacing drug smugglers to an array of deadly jungle creatures. No explorer has ever returned from the particular wilderness that the route encompasses and the group can't find a local tribesman who's prepared to guide them. They proceed nonetheless, and soon begin to find out why even the natives are terrified to enter the jungle - as a whole host of dangers closes in for the kill.