Very beautiful - stunning views. Many churches dotted along the way. A bit dangerous in some areas - there was a particular section with a very narrow path, unstable ground and no fence. Not particularly difficult but wouldn't recommend it for young kids, elderly or those afraid of heights. It took me 3 hours because I kept stopping for photos. Bring water and a cap and set off very early, I recommend 7am because there's no shade anywhere and it gets scorching early on, and you also want to explore Oia at the end. Wear comfy trainers please!! I saw people with sandals and I have zero idea how they handled it because it seems very dangerous and uncomfortable that way.

We walked in June from Fira to Oia, the distance is approximately 8 miles from the centre of Fira, with a moderate difficulty, ideally wear trainers, not flip flops, it’s up hill most of way Finding your way out if Fira to the path is a little tricky but just keep heading up, with the coast on the left. No real places to stop for drinks, take plenty of water, one little road side cafe about 3/4 of the way into walk. Oia is very beautiful, modern, clean, similar to Fira but more boutique style. Shopping and restaurants similar to Fira. We got the local bus back to Fira for 1.60 euro. Bus station easy to find, in square, below main shops, times on electronic board, going every 30 minutes. Buses take cash only. They say go to Oia for the sunset, which of course is fantastic, but we found it just as lovely in Fira, and slightly less crowded at sunset especially if you can get a restaurant table

I would absolutely recommend doing this but it’s not a short walk and you do need to wear trainers. You won’t get lost, the track is easy to follow, just be prepared - Take water, sunscreen and a hat (shaded spots are rare) and a camera. The views are breathtaking. Oia is very pretty and seemingly busy in the day. Plenty of places for lunch or a drink. We opted for ice cream and view of the sea. Rather than walk back we took the bus to Fira. The buses are busy and hourly but cheap and comfortable, certainly worth planning into the day as a round trip would be over 20km.