Huilo-Huilo Falls, Waterfall in Los Ríos Region, Chile

Huilo-Huilo Falls plunge over volcanic rock formations along the Fuy River within a private nature reserve in the Los Ríos Region. The site combines the waterfall, river landscape, and surrounding native forest into one geological and natural system.

The falls lie along the Fuy River, whose water comes from Lácar Lake in Argentina. In summer the flow often dries up because of low rainfall and water seeping underground; that seepage feeds a large aquifer beneath the Mocho-Choshuenco volcano. Contact between aquifer water and magma may have caused the phreatic eruptions that formed the Tumba del Buey crater on the volcano's western flank.

The falls lie in the Huilo-Huilo reserve, created in 1999 on land that had belonged to the state forestry complex Panguipulli. Traditional celebrations are held in the reserve area, and folklore forms part of the local school curriculum in Neltume, the nearest town.

The falls lie along the Fuy River inside the Huilo-Huilo reserve, reached from the main gravel road between Panguipulli and the Hua Hum Pass; the nearest town is Neltume. Water flow drops sharply in summer, when the river often dries, so time a visit for the wetter months. Sturdy footwear helps on the uneven, slippery ground.

The falls' water comes from Lácar Lake in Argentina, and in summer the stream often dries up entirely because of low rainfall and water seeping underground. That seepage feeds a large aquifer beneath Mocho-Choshuenco volcano; contact between this water and magma may have driven the phreatic eruptions that formed the Tumba del Buey crater on the volcano's western flank.