I don't know? I was thinking maybe 175-225? Really don't have a point of reference except for a couple of years ago when my target was 450-500 miles per day trying to get from NYC to LA. That ended with a totaled bike, so I've learned my lesson with strict mileage and timeframes.
Have you done the whole TAT? If so what are you thinking? I'm not a noob anymore, so my speeds are higher than a couple of seasons ago offroad.