The way from Comillas to Colombres is not extremely difficult but it is a long one with 28.8 km distance and about 7 hours to walk. The landscape is beautiful and there are many nice places to stop on the way. Some pilgrims prefer to make a stop in San Vicente de la Barquera and split the day in two, as seen in the two maps below:

From Comillas to San Vicente de la Barquera

From San Vicente de la Barquera to Colombres