I tried to climb a small mountain.

I realised I don't exercise or play any sports these days. I read an article in a newspaper about trekking. 

I wanted to try it. I asked my family to climb a small mountain. They wanted to try too. I went by car. The mountain was about 180 meters tall. We never thought we could fail to climb the mountain on our first try but the slope was steep. My husband gave up on the way to the top. The slope got steeper gradually. I needed a stick and then I followed my son. He didn't need a stick. I finally reached the top of the mountain. The view from there was so beautiful and made me feel relaxed. I made a good memory with my family.

(Relaxed = comfortable. Other words to use instead in this sentance: calm. serene. )

I tried to climb a small mountain.

I thought that I didn't exercise and play enough sports these days. I read an article in a newspaper. It was about hiking.*

I wanted to try it. I asked my family to climb a small mountain. They wanted to try too. We drove to the mountain in our car. The mountain was about 180 meters above sea level.** We never thought that we would fail to climb the mountain on our first attempt, but the slope was steep. My husband gave up on the way to the top. The slope got steeper gradually. I needed a stick and later I had to follow my son. He didn't need a stick. I finally reached the top of the mountain. The view from there was so beautiful and made me comfortable. I had a good memory with my family.

Changes in red are spelling or grammar fixes.

Changes in blue are to make sentences sound more natural.

* Hiking or mountain climbing is the most common word for this, but there are many alternatives. Tracking is usually following trails left by people or animals, although you do walk on tracks up mountains. :)

** I wasn't sure if you meant that the mountain was 180 metres tall, or 180 metres above sea level. Both are natural, normal statements about mountains. 

Very good! Well done. :)　I'm glad you enjoyed your trip - mountain climbing is the best!