Richardson's men, unprepared for the snow, made a difficult trek back to the lowlands.

K2 was a bit more difficult trek than Everest, but it's still very much do-able.

It was fresh, while he was lean from the difficult trek over wasteland and mountain.

This is a moderately difficult trek as the hill is precipitous and high.

After making a difficult trek through the mountains to visit him, Paul died, and was buried by Anthony's hands.

He had managed a long and difficult trek.

There was nothing for it but to make the difficult trek into the blue depths.

For a moment, he watched the captain start the difficult trek back up the slope.

After 6 km of difficult and tiring trek, one wonders as to when he will reach the destination.

But it was across rough country, a trek difficult enough during the day, let alone at night.