They say death awaits those who see the young man on a white horse in Shotts Cemetery near Ford City Pa.

There is a small isolated cemetery up a lonely country road near Ford City Pa. which has a legend of a young man named Ruben Briney who is supposed to have hanged himself in anguish after losing the love of his life from his white horse on a near by tree

https://hauntsandhistory.blogspot.com/2009/06/ford-city-folklore.html

its  said he has been spotted riding his horse and if you se him you will die like he did. 

Although the grave was a real grave and he may have in fact committed suicide the rest of the creepy tale appears to be more legend than fact. 

The story coming from the epitaph on his grave stone 

"As you are now so once was I, As I am now so you will be; Remember me as you pass by, Prepare to die and follow me."  

How ever if you want to check it out the cemetery is accessible and close to Crooked Creek State Park. 

Which is a big time gathering place for horse lovers as they hold a yearly rodeo. 

http://pennsylvania.hometownlocator.com/maps/feature-map,ftc,2,fid,1187607,n,shotts%20cemetery.cfm

So seeing ayoung man riding a white horse in area is very possible.