I was going to say that also. Make your lanes atleast 10' wide, and set up your jumps first. You run the track for a couple of hours with just take off ramps. As you are jumping keep marking your landings. You wan't to put your landing ramps in the areas your landing. Remember to start the top of your landing behind the marked landings. This way you are landing on the downslope of your landing ramps. What type of vehicles are you going to be running? If you give me your exact dimensions I would be glad to help with layout, if your intrested.