My top week was 115 miles back in 1999. Did 107 back in January this year whilst nursing a blister that had become an open wound that required certain shoes which I couldn't realistically run for more than an hour in so I did it in 16 sessions !! Normally tick over at 75-80 miles a week though. Agree re extra long runs at slow pace they are easier to recover from than shorter (ie marathon) at race pace.