Pillar Falls, Natural waterfall in Twin Falls County, Idaho, US

Pillar Falls is a waterfall on the Snake River in Idaho where water drops over a wide rocky shelf and is divided into multiple channels by basalt columns. The river flows through a landscape shaped entirely by volcanic rock formations.

Pillar Falls lies on the Snake River near Twin Falls, Idaho, where the river drops about 20 feet (6 m). The falls formed where the river cut through the basalt of the Snake River Plain, leaving several basalt pillars that divide the flow into multiple channels.

The name comes from the basalt pillars that split the Snake River into several channels at the drop. The falls sit close to Twin Falls, the city named for a larger waterfall on the same river, and the pillars remain the feature people single out when describing the site.

The trail to the falls starts from Pole Line Road and involves a moderate hike with steep sections that require solid footing. Wear appropriate hiking shoes since the ground can be uneven and slippery in places.

The basalt pillars that give the falls its name split the Snake River into several channels, and the river drops about 20 feet (6 m) through them. The pillars are the feature to look for: the water passes between them rather than over a single ledge.