It’s no walk in the park

The answer to the crossword question “It’s no walk in the park” is TREK. A trek is a long and difficult journey, often taken on foot or by other means of transportation. It can be physically and mentally challenging, requiring endurance and perseverance. This term is often used to describe a challenging hike or a journey through rough terrain. So, if you’re looking for a word that describes a difficult journey, the answer is TREK.