Complex sentence: When fully complete, the trail will run from Chadron to Norfolk, a length of 321 miles (516 km); it is the longest rails to trails conversion in the United States and is Nebraska's first state recreational trail.
Split into simpler sentences: When fully complete, the trail will run from Chadron to Norfolk, a length of 321 miles (516 km). It is the longest rails to trails conversion in the United States and it is Nebraska's first state recreational trail.