Your legs warm up on their own, your breathing stays calm and your mind is free to wander along with you. This is an easy day, even though you’re heading up into the mountains. At the top, what you’ll notice most is the fresh air.
The highest point is at around 1500 metres. That’s where you cross into Asturias. After that it’s mostly downhill, and you’ll feel it in your thighs and knees. At just over five hours, it’s a relaxed pace, with time for a photo and a sandwich in the grass.
Tarna is small and quiet, a village in the mountains. You’ll arrive in plenty of time. A practical note: the descent is longer than the climb, so go easy on your knees and take your time.