From Kuala Tahan, this trek takes roughly three days. Day one: take the trail to Gua Telinga, and beyond, for about seven hours, to Yong camp site. Day two is a six-hour walk to the Rentis camp site. On day three cross Sungai Tahan (up to waist deep) to get back to Kuala Tahan. It’s roughly a six hour walk, or you can stop over at the Lameh camp site, about halfway.