Papua New Guinea
If you’re into battling extreme weather and malaria (and who isn't really?), this may be the hike for you. The Kokoda Track is a 60-mile route that runs across Papua New Guinea through the land of the Mountain Koiari people. At its peak, as it rounds Mount Bellamy, it reaches 7,185ft. It usually takes up to 12 days to complete and offers some treats along the way, namely, scorching hot days, frigid nights, brutal rains, and the aforementioned very real risk of contracting a deadly disease.