Gjern Bakker have emerged as a rim of a glacier, cut through by large amounts of meltwater during the last Ice Age, creating a tunnel valley from Gjern to the River Gudenå. The highest point of Gjern Bakker is Åshøj, which measures a 104 metres.
The hills have previously been covered by forest, although most of it has now disappeared - cut down and used for building houses. Instead, the hills today are covered with a beautiful coat of heather. What remains of the original forest is a bit of oak shrub on the banksides.
In 1893, residents of the area made a suggestion to the Danish Heath Society that Gjern Bakker should be replanted. They believed the area deserved a better fate, due to what they termed an “outstanding natural beauty”. The area has since been planted with spruce and pine.
You find a map of the area here. The map includes suggestions to 5 different routes, categorized by an assortment of colors.
Red trail (1 and 2½ km)
Yellow trail (1½ km)
Blue trail (1½ and 3 km)
Purple trail (2 and 3½ km)
Orange trail (3½ km)