This is not a route where the Camino sorts everything out for you. It is a small expedition to the monastery of Santo Toribio de Liébana, where the Lignum Crucis is kept. You are not walking to Santiago, but to Santo Toribio. That makes it quiet, individual and well suited to pilgrims who like to plan their own days.
The start is wide open and flat, alongside the Canal de Castilla. In Frómista you cross the Camino Francés and see plenty of rucksacks for a while. After that it gets quieter. From Herrera de Pisuerga you walk up into the mountains of the Montaña Palentina, past small villages and Romanesque churches. In Cervera de Pisuerga you cross the Camino Olvidado. The route climbs to well over 1,400 metres and then descends into Liébana. Bars, shops and fountains are few and far between, so carry enough water and food with you every day.
Book every night in advance, preferably via WhatsApp. Many places to stay are only open from Semana Santa until October. So walk the route between mid-April and the end of October. May, June and September are best. In the winter months it is cold and wet. You can get your credencial free of charge in Palencia, Frómista or Herrera de Pisuerga. At Santo Toribio you receive the Lebaniega at the end.