The phrase "along the river" means to travel or move along a river, following its course. It can also refer to activities and events that take place alongside or near a river.
Sentences with «along the river»
Unfortunately we only picked up a few new scarves, but it was a lovely walk along the river in the shadow of the old castle walls. (chronically-overdressed.com)
Spend days spotting wildlife and nights sleeping in tents along the river banks. (gapyear.com)
In fact, you can walk straight from the hotel along the river in either directions, and the staff will provide you with maps. (thetravelmagazine.net)