Thailand in August

I am off to Thailand in August for work and have the option of some extra time and I am keen to get out of town and hike some country.
Anyone out there done any multi day hikes they could recomend or got any local insight that would be helpfull.
I prefer stuff on the tougher side of the norm, longdays and steep climbs for rewarding views make the best memories for me.
Anyone out there done any multi day hikes they could recomend or got any local insight that would be helpfull.
I prefer stuff on the tougher side of the norm, longdays and steep climbs for rewarding views make the best memories for me.