Our next stop took us a step up the evolutionary trail.

And why had he looked so carefully up the trail?

The men were a fair hundred yards up the trail.

He wondered how they'd brought the piano up the trail.

Together they walked from the falls and up the main trail.

I asked when we were a few miles up the trail.

Jenny turned her back and walked a little way up the trail.

Still pulling her arm, he started back up the trail.

She looked exhausted, even from the short walk up the trail.

Then, some distance up the trail, they heard the sound of singing.