Slope of Goats, Nature reserve in Aywaille, Belgium.

Heid des Gattes is a 54-hectare nature reserve on the right bank of the Amblève between Remouchamps and Aywaille. Its south-facing cliff of finely stratified sandstone with calcareous cement rises about fifty metres above the river, with woodland and bare grey rock patches on the slope. The reserve also takes in the former Goiveux and Falize quarries.

The reserve was created and classified on 29 May 1952, and in 2009 it was added to Wallonia's list of exceptional heritage. On 18 September 1794, French Republican troops defeated the Austrian army above the Heid des Gattes at the Battle of Sprimont.

The French name Heid des Gattes means "slope of the goats". A herd of maroon goats is kept on the reserve to maintain the site by grazing. The name is also borne by the hamlet of Sur la Heid on the plateau above the slope.

The terrain is rocky and requires sturdy hiking boots for safe movement on uneven paths. Bring water and snacks since facilities are not readily available nearby, and allow plenty of time to explore the reserve.

The reserve is home to the Aywaille houseleek, a rare plant species that grows on the cliff faces and has gained international botanical recognition. This specialized species has adapted perfectly to the harsh conditions of the vertical limestone surfaces.