User blog comment:- MHCaboose -/Monster Hunter Frontier Z Discussion/@comment-5225828-20170628092829/@comment-6050823-20170628133815

https://www.famitsu.com/news/201706/28136334.html

So Duremudira won't be appearing in Hunting Road, however, it'll now appear as a special emergency quest. The area is the some place where it was in the Sky Corridor.