Breathtaking scenery but you do need decent hiking boots and be reasonably fit. My 12 year old grandson and I did it in 3 and half hours because we needed to catch the 11.30 boat. Don’t try that unless you are super fit and prepared to run a lot of the way. The normal boat to take is at 5.30 and that makes the walk much easier. It is closed till from October till May and they close it when it rains. We were the 1st down that day and were lucky to see a family of Ibex. At one point the gorge is only 3.5 metres wide with rocks towering over 300 meters in each side. SPECTACULAR. It’s very well organised and although some days 3000 people go through the gorge. Anyway it’s a must if visiting Crete.