This definitely isn't a breed thing, it's the specific horse having an issue.  I have purebred Arabs and they all rock on the trail.  My last mare I broke by taking her out on the trails and just putting miles on her.  She's almost TOO lazy and quiet!

Bolting and spooking are two different things and unfortunately you have a bolter which is harder to deal with.  You really need to be an experienced rider or you may get hurt.  Do you have any friends that can help you out?