The boundary of the Long Rhön in the west along the Ulster valley may be taken from Hilders to its source roughly on the 600-metre-contour. The B 278 and an imaginary line several hundred metres west to roughly the height of the Rhönhaus separates it from the Wasserkuppen Rhön. The treeline as far as the Rhönkopf may be taken as the boundary with the Eastern slopes of the Long Rhön to the south and east of the area, continued by an imaginary line running north-northeast to the L1123 near Reichenhausen. The boundary in the north with the Auersberg Kuppenrhön is once again the 600-metre-contour and thuse circumnavigates the Buchschirm.