Hello there, I am thinking of doing the Iron Butt challenge during my road trip in July. I printed out the ride log and noticed there are two columns that ask for an odometer reading at each stop. The first one is easy- motorcycle odometer is just the odometer on my motorcycle. But the second one doesn't make any sense to me. I use Apple Maps because I am very familiar with it and can easily see the blue line while I am driving. But while it will tell me how many miles I have left to my destination, it doesn't tell me how many miles I've traveled so far. Also, I can just back out the number because when I go off course (pull over for gas or food) it doesn't keep a record of that. I am worried that I will fill out everything correctly, take pictures of my receipts next to my odometer, and then not get the certificate because I don't have a GPS with an odometer reading. Does anyone know if it is necessary to have a GPS odometer reading to get the award? Thank you so much.