Ralun is a small settlement in the Los Lagos Region, roughly 78 kilometers southeast of Puerto Varas. It is reached via Route 225 to Ensenada, then Route V-69, which leads down to the shores of the Estuario del Reloncaví.

The area sits at the junction of the Río Rollizo and the estuary, surrounded by mountains blanketed in native forest.

The locality serves as an access point for Caleta Rollizo, a small artisanal fishing cove that is the only place in the Puerto Varas municipality with a direct connection to the sea. Travelers passing through Ralun are also on the road toward Cochamó.

The area has a reputation for hot springs, though these can be submerged or obscured by river water during periods of heavy rainfall.