He travels 1450-100=<<1450-100=1350>>1350 feet vertically

So he travels 1350*2=<<1350*2=2700>>2700 feet horizontally

# Answer

2700
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
John starts climbing a very steep hill.  He travels 1 foot vertically for every two feet horizontally.  His elevation increases from 100 feet to 1450 feet.  How far does he move horizontally, in feet?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2700
John starts climbing a very steep hill.  He travels 1 foot vertically for every two feet horizontally.  His elevation increases from 100 feet to 1450 feet.  How far does he move horizontally, in feet?
train