Mountain Climbing Alone

Mountain Climbing Alone

Today I woke up early and tried to climb Mountain Hinode alone.

Since it takes about only three hours to climb up and down the mountain, it might be closer to hiking than climbing.

However, it was really tough for me to reach the top of the mountain, because these days I have not taken exercise.

When I reached the mountain's peak, I felt awful, so I needed to rest on a bench for about 30 minutes.

After recovering from the bad feeling, I realized that there were beautiful mountains with a nice view.

This is the best part of climbing.

一人登山

今日は早起きし、一人で日の出山を登りに行きました。

往復約3時間のコースで、登山というよりはハイキングに近いです。

しかし、最近運動していなかった私にとって、山頂まで行くのはとても大変でした。

山頂についたら、吐きそうになってしまい、30分くらい座って休む必要がありした。

そして気分が落ち着いてからまわりを見渡すと、見晴らしの良い素敵な景色が広がっていました。

登山の醍醐味です。

• Today I woke up early and tried to climb Mountain Hinode alone.
• Today I woke up early and tried to climb Mountain Hinode alone by myself.

  'alone' is fine, but 'by myself' might be more natural here.

• Since it takes about only three hours to climb up and down the mountain, it might be closer to hiking than climbing.
• Since it takes about only three hours to climb up and down the mountain, it might be considered closer to hiking than climbing.

• However, it was really tough for me to reach the top of the mountain, because these days I have not taken exercise.
• However, it was really tough for me to reach the top of the mountain because these days I have not taken been exercising.

  'taken exercise' is not a phrase that is used, 'been exercising' is more natural.

• When I reached the mountain's peak, I felt awful, so I needed to rest on a bench for about 30 minutes.
• When I reached the mountain's peak, I felt awful. So I needed to rest on a bench for about 30 minutes.

  'mountain's peak' is fine, but more people say 'When I reached the peak' because we already know they are talking about a mountain.
  
  There is a pretty big pause after 'awful', so I separated it into 2 sentences. (optional)

• After recovering from the bad feeling, I realized that there were beautiful mountains with a nice view.
• After recovering from the bad feeling, I realized that there were I could see beautiful mountains with a nice view.

  'After recovering from the bad feeling' doesn't sound natural in this case. You can also say "After resting for a bit" where recovery is implied.
  
  'there were beautiful...' is fine, but it's a bit unclear that you realized you could 'see' beautiful mountains instead of the existence of mountains being there.

• This is the best part of climbing.
• This That is the best part of climbing.

  'This' is okay, but most people would say 'That' since you talked about it already.

That sounds like a great time with gorgeous views! ^_^

• Today I woke up early and tried to climb Mountain Hinode alone.
• Today I woke up early and tried to climb Mount Hinode alone.

  I've no problem with 'alone.'
  
  Mountain --> Mount - It's not that 'mountain' is wrong but it is not convention. When we reference a mountain by name we use Mount (Mt.) instead of 'Mountain.'
  
  Mount Fuji
  Mt. Fuji
  
  Or as a casual reference, "I climbed Fuji."
  
  Think of 'Mt.' as sort of an honorific like Mr., Mrs., Miss, Ms. except for a mountain.