Watering Plan for Private Track??

With 700 gallons on my trailer it takes 7 minutes to fill. When watering the track i have a mark on the throttle that is just over half and that gets me 1/2 a lap on my .75 mile track. By the time i water the second half and refill for another pass on the first half the dirt has soaked it in and is ready for more. Typically with my higher clay content soil I only need 4 fills if there is any moisture in the soil. If its baked i need double the passes, but at that point i typically just go to a public track until it rains again. Once i figured out limiting the throttle to get 1/2 a lap distance it made it super easy, in about a hours time i can have my track watered for the next morning. 

I had four 3 inch Honda pumps that all tied in to one big 8 inch PVC pipe. I could fill both of our 2,000 gallon water trucks in a few minutes. We tried several methods, but the 4 pumps solved the problem. If you go the water truck route, make a smooth road next to the track, or you will be fixing water trucks.

That’s what we were using at our friend’s track, but it seemed like we were replacing 2-3 sprinkler heads every week after a while. They work incredible, super adjustable and powerful, just wasn’t worth the cost and the hassle. 

Whatever you calculate, leave room for more water. I had a friend who had a minicycle track in his front yard. We watered it with garden hoses connected to his hose bibs, which were driven by the well. I don't know how big his well pump was, but it supplied a reasonable amount of pressure to a garden hose; about equivalent to what's in my front yard for water pressure. 
Now, clearly, that was a lot less water than you are planning to put down, but I remember watering far more often and for a much longer time than I thought would be the case, even though we were only riding 50s and 110s. You basically had to have somebody watering at all times. As soon as he was finished with one station, the other areas were dry.