远足在英语中是 "hiking"。这个词来源于古英语 "hikan"，意思是 "行走"。例句：

I'm going hiking in the mountains this weekend. (我这个周末要去爬山。)

Hiking is a great way to get some exercise and enjoy the outdoors. (远足是一种很好的锻炼身体和享受户外的方式。)

The hiking trail was steep and rocky, but the view from the top was worth it. (远足小道陡峭而岩石多，但山顶的景色很值得。)