“沿着河岸”常见的英文表达是 along the riverbank 或 along the river shore。
“along” 表示“沿着” ；“riverbank” 指“河岸，河堤” ；“river shore” 同样表示“河岸”，侧重于河的边缘地带。
例如：
We walked along the riverbank, enjoying the cool breeze.（我们沿着河岸散步，享受着凉爽的微风。 ）
There are many beautiful flowers growing along the river shore.（河岸边生长着许多美丽的花朵。 ）