The nature reserve begins a dirt road, that connects the region to the plateau of the Graminhais to Pico da Vara, in an area that the road intersects para of the Ribeira do Purgar. The border inflects towards the northwest, passing to an area , until the isoline, then continues to the east until the pedestrian trail from Malhada, where it heads north to Grota Escura. From this grottoe is descends until the Ribeira do Guilherme, inflecting to the south to another grottoe that separates the spikes of Francisco Pires e dos Bodes, until the roadway of Tronqueira. The border continues to the north until Serreta, descending later to the west again, until the roadway once again, following it until the crossroad of Grotinha do Pico Verde. Continuing on the valley west until the isoline, it ascends until the elevation until the ravine west of Pico Verde. The frontier descends the ravine until the elevation, following a northerly trajectory terminating at the afluente of the Ribeira do Purgar.