Mount Tahan, located in Taman Negara, Malaysia's largest national park, is considered one of the toughest mountain climbs in the country. The journey from Kuala Tahan takes up to 10 days, passing through dense rainforest, rivers, and steep slopes. The expedition is suitable for experienced trekkers and a park permit, a guide, and prior arrangements are required for this extended adventure. Be rewarded with dramatic views and abundant wildlife.