I ride long distances, work in airports for a living, and spend a lot of time in hot countries and a lot of time hiking. I’m here to tell you there is no such thing as a single piece of lightweight footwear that will do all of the above and do it stylishly.
First off - those boots will not be lightweight. They’ll be well made of substantial leather and weigh a ton. I had western boots (purely for fashion) when living in the southern USA and they are solid bits of footwear! They are also really hard to get off unless you have a boot jack or a friend with you.
They won’t be practical in an airport - you’ll have to take them off for security (make sure you’ve got your friend with you again!) and they will click like a bastard on the hard floors. Everyone will turn round to see what is coming as you approach.
You could ride in them but they won’t help you keep your lower leg in the correct position if you are riding English style. This in turn will make you uncomfortable over long hours in the saddle. Plus any regular rider will look at your feet and have a quiet laugh among themselves. Who wears cowboy boots for riding? Really? Unless you are a genuine cowboy and can demonstrate the skills, you are just a weirdo with all the gear, no idea!
So, having dissed your choice what would I recommend instead? Well, not long Dublin boots either, they are for mucking out in st a push, but mainly for walking the dog or going to the pub in if you want to look ‘country set.’
The most practical boots for this sort of thing would be a pair of endurance boots. Ariat make various versions of those too. But my favourite brand are these Tuffa short boots with a pair of half chaps. I’ve been told by a more fashion-conscious friend they look like orthopaedic footwear. But they are lightweight, comfortable and you can walk all day in them. I also wear Bareback Kentucky boots, but I hesitate to recommend them because the first pair I bought (8 years ago) are like comfy old slippers, the second pair nearly sawed my feet off at the ankle.
Whatever you buy will need wearing in, like good walking boots would. And for gods sake please buy yourself a proper pair of riding tights while you are at it and ditch the leggings. The seams on leggings are in all the wrong places and could rub you raw if you are unlucky.
If you are really going to be on a riding holiday for riders, wear regular riding gear. Both for the sake of comfort and practicality. Leggings and/or cowboy boots scream ‘no idea’ to real riders, even Moroccan ones.