raceway

One flash showed them the canoe dancing down the raceway of a lower rapid, and at the next it had disappeared.

Dr. Quink forced himself to relax, to ignore the ins and outs of the commuters' raceway.

See the living stream pour into America through the raceway of Ellis Island.

Went in swimming today twise, once down to the raceway and once up to the gravel.

It reached the point where the curve of the opposite bank draws in to form the narrow raceway of the rapids.