The route begins at the Plaça de Dalt de Erill la Vall, taking a stretch of traditional road that descends, leading to the road to Boí. Taking extreme precautions, we must pedal on this road for 300 metres until reaching the start of the La Cultia trail. Now with no risk, the ascent on the trail begins, which maintains a constant and bearable gradient. Crossing the Planamolín ravine, the route begins to trace short and continuous loops inside the peripheral zone of protection of the National Park of Aigüestortes I Estany de Sant Maurici. After crossing the head of the Ribampiedro ravine, the trail ends at the livestock meadows of the “bordas” (huts) of Erill or Basco. The descent is made following the same itinerary.
Caution in the descent and in the stretch of the road journey.
The high part of the route enters the peripheral zone of protection of the National Park of Aigüestortes I Estany de Sant Maurici.