Mount Trus Madi, Mountain summit in Sabah, Malaysia

Mount Trus Madi is a 2,642-metre summit in Sabah's Interior Division, the second highest in Malaysia after Mount Kinabalu. Its Tertiary geology consists of mudstone, shale and argillite with subordinate beds of quartzite, sandstone, siltstone and limestone breccias. The mountain lies within the 184,527-hectare Trus Madi Range and its forest reserve.

The mountain's name comes from Dusun words where pinotorusan means hunting ground and Madi refers to a hunter who regularly visited the area. This naming reflects the long-standing relationship between local communities and the peak.

The Dusun name Nulu Trusmadi links the peak to Madi, a hunter said to have frequented the area, and pinotorusan, meaning hunting ground. Local porters and guides still use the trails, and the mountain's pitcher plants appear in the naming of Nepenthes × trusmadiensis. Bird hides near the trails, in use since the COVID-19 pandemic, let visitors watch Bulwer's pheasant; about 43 bird species occur around them.

The climb requires a minimum of two days and one night, with mandatory registration at the Forestry Check Point before departure. Hiring a certified mountain guide is advisable to ensure safety throughout the ascent.

The summit can be reached via three distinct trails: Wayaan Kaingaran from Tambunan, Wayaan Mastan from Keningau, and Wayaan Mannan from Sinua. Each route offers different starting points and challenges, allowing climbers to choose based on their location and experience.