While most horses look forward to a mentally relaxing hack on the trails, there are some that don't take to it.
I had to sell a horse I rescued because he couldn't adapt/adjust to the trails.
I once looked at a horse that had never seen anything but the show ring. She lost it when I tried to take her down the Seller's tractor lane, next to the corn field where the corn stalks were blowing around. By that time in life, I did not want to mess around taking the time to try and re-school her mind so I passed on her.
The next horse I looked at had become totally ring sour and that was why she was up for sale. Her very calm demeanor made me take a chance on her.
The first time we hit the trails beside the river, she thought she had found Nirvana. I never anything with that horse but point her, she was thrilled to be away from the show ring and on the trails.