Stage 1 will take you to a sign describing a tragic accident. Take note of the model of the machine being used and the year of the incident. Ignore the letters in the model. You will need this information to get the final coordinates, which will take you as close to the actual incident as possible. The final is approximately 3 miles away. When you arrive at the final, parking could be challenging. It's better on the side that the cache is located, which may not be the direction you are traveling. Also, look at the group of trees in the field across the street from the cache to see the actual location of the incident.
The final cache is located at N 35° 29.X W 077° 51.Y
X = Year - 1418
Y = Model + 427
Spoilers may be found at this link, so check it out AFTER you make the find. If you have been intrigued by this site, you can read more here.