Hazards

Water is is probably the number one issue that requires preparation and vigilance. You will need to know your consumption, know where sources are, have the capacity (physical and storage) to carry enough and treat it appropriately. It is a good idea to have a light cord for lowering a bottle into a cistern.

Number two must be injuries due to tripping over on the rough sections or indeed over any number of ancient ruins one might come across. It is worth having a decent crepe bandage in your First Aid kit.

Number three is probably sunburn and (for those hiking too close to summer) heatstroke. There are a few things to take care of here: Hike within your capacity, keep well hydrated, rest in the shade where possible, hike at cooler times of day, use wet cloth and hats effectively, and add electrolytes to your drinking water. In some places an umbrella would be effective, but unfortunately in many others... not so much. 

There may be dogs in some places. Poles are useful for many reasons and their use as a defensive mechanism is just one of them. Two poles are so much better than one, but one is a lot better than nothing (and indeed in some terrain can be the preferred option).

Achtung indeed!

Scorpions! It is generally a good life habit to empty one’s footwear of unwanted wildlife before putting them on. This is especially true where there might be scorpions. I generally store my boots upside down outside the tent in the vestibule. On this trip I might consider bringing them in overnight. 

And where there are scorpions there might also be snakes. So those sensors in your head need to be switched ON. This comment is especially aimed at those coming from Iceland/Ireland/New Zealand/the Arctic. Please see my Scottish National Trail blog for what happens if you fail to do that.

Last, but by no means least, there is that most dangerous animal the human. Amongst whom the most frequently hazardous is... oneself!

Post-hike update
I saw no scorpions and only two snakes in a month. One was a very thin green-grey one before Kalkan and the other a substantial black snake in the ruins of Olimpos. Apparently both are harmless.

Dogs were rarely a problem, and even then it was more bark than bite. It’s good to respect the ones that are just doing their job guarding goats.

Water availability was not a problem, but did require forethought and planning.

The most tiring sections were those where the terrain demanded the greatest concentration in foot placement. The 2-3 hours before Kalkan being a case in point.