Determining the Layout
Determine the environmental impact the track will cause to the surrounding area. Build a track away from public areas and private residences. For example, do not build a track next door to a neighbor's house. The track should be secluded on private land in accordance with town laws. Check the building codes at your town hall to ensure that the track is legally allowed to be built. Determine how the track will be protected from trespassers who may want to use it. Plan to build a fence with a locked gate around the track to prevent unwanted people from entering the property.
Inspect the land in which the motocross track will be built on. Count and mark down on paper how many trees and boulders must be removed from the area. Heavy machinery will have to be used to remove these obstacles during the building process. Moving all vegetation is not necessary if the track is built around the trees or shrubs. Determine how much land is available to build the motocross track on. Two acres of land or less will result in a small track, while three or more acres will ensure a larger track.
Draw a rough draft of the track layout on paper, using a pencil, in correlation to the land. Mark on the paper where the starting point will be, the turns and jumps. Design the track based on the skill level of the rider and budget. For example, a beginner may have a few small jumps, wider turns and longer straightaways as opposed to an experienced rider who may have several large jumps and tighter turns.
Mark the land with small flags spaced about 10 feet apart from each other in accordance to the drawing. Ride the track a few times before actually building the track. Determine if the layout needs to be changed if the rider is not comfortable with it. Keep the flags in the ground until the track is built.
Building the Track
Keep the motocross track as is for a natural track design. A natural track, which does not involve man-made obstacles can be built without heavy machinery, such as a bulldozer or tractor. Natural tracks use the obstacles of the land, such as valleys, hills and grass.
Use heavy machinery to build the obstacles for a man-made motocross track. Create jumps with the bulldozer and tractor with a bucket by moving mounds of dirt from another location to the track or by setting up wooden ramps. Pile up the dirt to a desired height based on skill level you are building for. Run the tractor over the dirt pile to compress the dirt. These mounds of dirt will provide small jumps for riders. Place wooden ramps, which are normally used for bigger jumps, on the track in accordance to the track layout. Heavy machinery can be purchased or rented for building a motocross track. This type of equipment can be costly, but is needed in order to build and maintain the track.
Create heightened dirt barriers for tight turns using the bulldozer. Riders use the dirt mounds on the turns as leverage for going around the turn quicker. Create a dirt barrier around the turn about 2 feet high. Pack the dirt tightly to enforce the dirt wall along the tight turn.
Create the track barriers. Hammer in sturdy plastic rods in place of the flags on the perimeter of the track and around the inside lanes. The rods should be 10 feet apart from each other. Stretch flexible plastic barrier fencing around the plastic rods one 10-foot section at a time. Poke two holes through the plastic barrier with a screwdriver. Insert a plastic safety tie through one end of the barrier, around the pole and out the other end. Secure the barrier to the plastic rods by tightening the safety tie.
Spray paint the starting line of the track using white spray paint. Create a 1-foot wide starting line across the lane. Allow the paint to dry overnight.