Liakhvi Strict Nature Reserve, Protected nature reserve in South Ossetia, Georgia.

Liakhvi Strict Nature Reserve is a protected area spread across the southern slope of the Greater Caucasus, with mountain terrain, mixed woodlands, and river gorges. The landscape shifts between dense forests of oak, beech, and hornbeam trees, and open valleys carved by flowing water.

The reserve was established in 1977 to protect high-mountain forests in the upper basin of the Malaya Liakhvi, in the Tskhinvali district. It covers 6,084 hectares, of which 5,283 are forest, across altitudes of 1,200 to 2,300 metres, including the Gnukh gorge. Since 2010 it has also been called the South Ossetian State Reserve. Long left unattended during the unstable period, it began operating again in 2009 but remained technically unequipped.

The reserve's name comes from the Liakhvi, whose upper Malaya Liakhvi basin it occupies. In 1957 a broadcast about the South Ossetian region was filmed partly here, and part of the plot of the film "Olympus Inferno" takes place on its territory. The reserve was also renamed the South Ossetian State Reserve in 2010.

The reserve sits at elevations ranging from 1,200 to 2,300 meters, creating different conditions depending on where you go. Visitors should prepare for varying weather and terrain difficulty as they move between lower and higher sections of the protected area.

Part of the plot of the film Olympus Inferno was set on the reserve's territory, and in 1957 a broadcast about the region was filmed here, partly inside the reserve. The reserve also covers several gorges, among them the Gnukh gorge.