Jilmová skála, Natural monument in Horní Vltavice, Czech Republic.

Jilmová skála is a natural monument on a rocky ridge running north-south from Červený vrch, in the southern spur of Boubín on Šumava, 985 to 1037 m above sea level and 1 km north of Zátoň. Its migmatized biotite paragneiss and cordierite nebulitic migmatite outcrops form frost-riven cliffs, tors and stone walls above boulder fields, under beech-fir-spruce stands.

The area received official protection status from the Czech Environment Ministry in 1985, establishing it as a safeguarded natural site. This designation preserved the geological formations and forest ecosystems from future development.

The name Jilmová skála refers to the elms (jilm) that once grew here in numbers; the rock itself gave the site its name. Since 2000 the monument has been one of the stops on a 13.2 km forestry educational trail. The rock area itself is closed to the public.

A walking trail passes through the area offering visitors insight into local plant and animal life. A train line connects the Vimperk and Volary regions and runs along the southern and eastern edges of the site.

The rock formations consist of ancient stone shaped by frost and ice over thousands of years. This weathering has created unusual forms and textures rarely seen elsewhere in the region.