Hiking is my favorite sports. Some of my holiday/weekends, I will go hiking with my friends.
Hiking is a hard work but every time when you cross the beautiful mountains， the rivers，even the deserts，you will find everything is worthwhile！
The photo below was taken 2 month ago，which I was hiking at Nei Menggu grassland in China. 聼起來自然嗎?

I would say:
Hiking is my favorite activity. On some of my holidays and weekends, I go hiking with my friends. Hiking is hard work, but every time you cross the beautiful mountains, rivers, and even deserts, you realize that it was all worthwhile. The photo below was taken two months ago, when I was hiking at the Nei Menggu grassland in China.