I eat the same pretty much all year bro... its at a near 1000 calorie deficit... I still manage to hold good size throughout... I have ways of going about it though that are much different...
So almost 10 miles a day lol? Dayyyum man. I ran cross country in high school, and I think the longest I ever ran was like 8 miles. And that sucked haha.
You might have mentioned this before, but do you run races/marathons or anything like that?