20 Hole Layout. Please take note of the hole numbering - there is no Hole 4 intentionally: Holes 1-3; A; 5; B; 6-17; C; 18. Two meter rule is in effect. OB over any fence, or if disc is fully surrounded by concrete or asphalt (parking lot and bathrooms). There are OB white painted lines. Part of your disc MUST be touching inbounds. The line itself is our of bounds. Missed mandatories throw from marked drop zones. Mandatories are defined as the vertical plane defined by the painted line and the marked edge of tree. Each hole has rules for the hole, as well as general information.