The terrain was challenging for the hikers.

A specific area of land with particular physical features, especially in relation to its elevation and surface conditions.
We studied the terrain before our trip.
The terrain changes as we climb higher.
Navigating the rough terrain was difficult.
rugged terrain
mountainous terrain
flat terrain
landscape
topography
geography
The hikers studied the terrain before starting their journey.

A specific area of land with its physical features.
The map showed the rocky terrain ahead.
Farmers need to understand the terrain for planting crops.
The military trained in various types of terrain.
rough terrain
mountainous terrain
urban terrain
landscape
topography
geography
The terrain was mostly flat, making it easy to walk.

The type of land, such as flat, hilly, or mountainous.
The terrain was rocky, making it hard to drive.
We hiked through the hilly terrain of the park.
The desert terrain was dry and barren.
rugged terrain
mountainous terrain
flat terrain
landscape
topography
geography