If all else fails, why not chart your miles based on your average speed from when you were riding regularly? If, for example, you averaged about 15 mph before, then give yourself 15 miles for every hour on the trainer. Then, transfer those miles to www.MapMyRide.com & begin charting your journey across the country. If you save your ride you can add to it at any time.
"When I'm on my bike I forget about things like age. I just have fun." Kathy Sessler
2006 Independent Fabrication Custom Ti Crown Jewel (Road, though she has been known to go just about anywhere)/Specialized Jett