Cheontaesan (Korean: 천태산) is a 631-meter-high mountain in Gyeongsangnam-do, South Korea, on the border between Miryang and Yangsan cities.
It lies near the southern end of the Yeongnam Alps, and looks south across the Nakdong River to Gimhae.
[1] Tourists reach the mountain's southern flank on the local highway which crosses from Wondong-myeon in Yangsan to Samnangjin-eup in Miryang.
These include the Ungyeon waterfall, which lies on the southern flank just below the Cheontaeho reservoir.
The name "Cheontaesan" comes from the Cheontae Buddhist order, which was established here in the 7th century.