Paso Mamuil Malal is an international high mountain pass at an elevation of 1.253m (4,111ft) above the sea level, located in the Andes, on the border between Chile and Argentina.
The pass, also known as Paso Tromen, links Junín de los Andes (Argentina) and Pucón and Curarrehue (Chile). To reach the summit, on the Chilean side, the road is called Ruta CH-199 and on the Argentinian side is Ruta 60. Both roads are gravel. This is a maintained road where a high clearance 2WD vehicle is able to travel safely at low speeds on long dry straight-of-ways, without losing control due to wash boarding, ruts, or dips. Before traveling, it is advisable to check that both countries are using the same time zone at the corresponding tourist offices, as Chile usually changes it during certain seasons.
The road includes some narrow sections and is gravel. This road is usually open all year, but it can be closed anytime when the access is not cleared of snow. Occasionally, the pass is closed as a precautionary measure due to the accumulation of snow in the winter. During the winter months, snow chains are compulsory.