The correct answer is 1.
The number that corresponds to the Oregon Trail is 1.
The Oregon trial starts in Missouri and ends in Oregon. The distance between these two points is 2,170 miles. In the 1800s, this was the trial that more than 500,000 explorers walked to settled in the territories of the West Coast. At that time it was a dangerous road that killed many settlers. Many died of exhaustion and hunger.