"I became an Uber driver in June of this year. I have not been tracking my mileage while in Available status and am without a passenger. Short our going thru the ride history of nearly 400 rides to capture this mileage, is there an easier and reasonable way to do this?"
Yes. Along with a 1099-Misc, Uber will give you a "Yearly Statement" at the end of the year which will include your "online miles". Look for it under "Tax Information" on your Uber.com dashboard.
