Coming from Amsterdam:
Take exit 13 "Amersfoort-Noord" on the A1 and go left. At the second traffic lights you go to the right, then immediately to the left and again to the left you enter the parking area.
Coming from Zwolle, Apeldoorn, Utrecht:
At the junction A28/A1 “Hoevelaken” go direction A1 Amsterdam; take exit Amersfoort Noord; at the traffic lights go to the right. At the second traffic lights you go to the right, then immediately to the left and again to the left you enter the parking area.
Parking is free.