run along是一起跑的意思，而go along则是一起走的意思，区别可以从以下例子可以看到

Do you want to go along with me? I am tired today, can't run along with you, you can run first, I will meet you later. 你想和我一起去走吗？ 我今天累了，不能跟你一起跑，你先跑，我晚点见。