Sentence 1: I decided to go for a hike one day. 
 Sentence 3: I had not been hiking recently, and did not take that into account 
 Sentence 4:  I hiked until I was tired, forgetting I had to walk back 
 Sentence 5:  I had forgotten water too, and struggled all the way home 
 Option 1: I found a trail in the woods which went for many miles. 
 Option 2: I brought a bottle of water and sunscreen.