They walked back along the riverside.

他们沿着河边往回走。

《柯林斯英汉双解大词典》

One hundred trees were planted along the riverside yesterday afternoon.

昨天下午沿着河边种了一百棵树。

youdao

When I was young, I used to play along the riverside not far away from my house, on which grew a lot of unknown plants.

小时候，我经常去离家不远的河边玩耍，河边上生长着很多不知名的植物。

youdao

I love jogging in Riverside Park as well along the river.

我也喜欢沿着公园的河畔慢跑。

纽约的公园 - SpeakingMax英语口语达人

Work is to start in the summer on development of derelict land along the riverside in Northampton.

BBC: An artist's impression of St Peter's Way Development

Mr Gillespie was said to have been taking a stroll along the riverside on a spring afternoon to look at the daffodils when a man stepped in front of him.

BBC: Man in court over Stirling war hero John Gillespie's death

The area is in a section of the national forest in the Santa Ana Mountains, which lie along the border of Orange and Riverside counties southeast of Los Angeles.

NPR: 1 Calif. Hiker Still Lost, 1 Found And Recovering