You wanted to be climbing the mountain, but you're not actually climbing a mountain.

你想去爬山，但是实际上你不是在爬山。

耶鲁公开课 - 死亡课程节选

If I want to go climbing when I'm done here, I can go climbing.

要是我不想待在这里了，而想要去爬山的话，那我就能去爬山。

向往自由的生活 - SpeakingMax英语口语达人

and then after the cafe we went on a hike in the mountains."

喝完咖啡我们就会去爬山。”

That's all课堂 - SpeakingMax英语口语达人

So we were thinking about going to a mountain.

我们之前还想去爬山，

I think 实战 - SpeakingMax英语口语达人