Grade 4

說明：The trail is located in a remote mountainous area. The path is formed, but parts of the terrain are rugged, and there are potential risks due to unpredictable weather. A normal itinerary can be completed in three to five days, or within three days if the trail features challenging terrain.

適合對象：People with good physical fitness who have the ability to read maps, carry heavy loads while walking, survive in the wilderness, assess risks, and respond to emergencies.

建議裝備：Bring the necessary camping and related technical/climbing equipment based on your itinerary.