I don't yet have a copy of the monster manual so I apologize if this is explicitly stated in there.
The Orc has an "aggressive" trait that allows it to "move up to its speed toward a hostile creature that it can see." Can this trait be used with Dash, thus allowing an Orc to run 30 feet (in any direction), dash another 30 feet (again, any direction), and then run 30 feet again (but this last burst towards the enemy)?