Caldron Linn, Double-tiered waterfall on Snake River near Murtaugh, Idaho.

Caldron Linn, also called Cauldron Linn or Star Falls, is a waterfall on the Snake River in southern Idaho, on the line between Jerome and Twin Falls counties. The river is forced through a narrow rocky gap, and the churning water that results is what gave the site its name. It lies east of present-day Murtaugh and south of Hazelton.

The site was explored in 1811 by the Wilson Price Hunt expedition, which suffered losses at this location. The difficulties forced the group to abandon their river route and change direction.

The name comes from a waterfall in Scotland, likely given by a Scottish member of the 1811 Hunt party. The Snake River site is also called Cauldron Linn or Star Falls. It was listed on the National Register of Historic Places in 1972 for its role in the Overland Party expedition.

Access requires a steep hike down the canyon without railings or marked trails. Visitors should wear sturdy shoes, exercise caution when wet, and allow time to explore carefully.

The waterfall attracts photographers, particularly during spring months when water volume surges and the cascade becomes especially forceful. The best viewing spots offer glimpses of the churning current that tears through the rocky gap.