This exercise is called The Crown and is a similar setup to The Slide using a variation of the standard 3 poles. Again, there are sections where ⅔ of the poles overlap with ⅓ of the pole sticking out. You have sections where you can ride 1 pole alone, 2 poles together and then all 3 poles too! They are one trot stride apart and the ends are measured to make sure they are parallel.