Jedlový důl, Nature reserve in Albrechtice v Jizerských horách, Czech Republic.

Jedlový důl is a nature reserve covering the valley of the Jedlová stream between about 650 and 770 metres above sea level, in the Jizera Mountains. Its semi-natural woodland is made up mainly of spruce, beech and fir, and the stream rises in a peat bog north of Čihadlo hill.

Jedlový důl was declared a nature reserve to protect a valley whose semi-natural woodland of spruce, beech and fir supports valuable plant and animal communities. The reserve lies within the Jizera Mountains Protected Landscape Area and a bird area of the same name, and is administered by the AOPK ČR office for the Liberec region.

The name comes from the fir trees that once covered these forests. Along the valley floor, visitors encounter markers and signs that explain the plants and animals found in this mountain setting.

Access is via a marked blue hiking trail that begins in Josefův Důl and leads through the valley. The path is accessible for visitors and passes by waterfalls as it progresses.

The Jedlová waterfall, about 30 metres beyond the reserve's upper boundary, has a main drop of 5 metres and a usual flow of 200 litres per second. The Jedlová stream rises in a peat bog north of Čihadlo hill (967 m).