 The section with the steepest grade (up to 2.147%) begins there; Wilhelmsdorf station, which is at the end of it, is a good 390 metres above sea level.A narrow gauge railway branched off here against the direction of travel to Merzhausen military airfield (now used for the "Erdfunkstelle Usingen", Usingen earth station).After another slight climb past the junction of the BGS camp, the line reaches its high point at the edge of the forest.