The 2011 Cheltenham Gold Cup winner Long Run will miss this season and return to racing in the autumn, says owner Robert Waley-Cohen.
A two-time winner of the King George VI Chase, ridden by Waley-Cohen's son Sam for trainer Nicky Henderson, the horse fell in the 2014 Grand National.
"Long Run won't be ready to run this season," said the owner on Twitter.
"Greatly looking forward to seeing him racing again this autumn. First won in 2007 but still aged only 10."
Long Run was one of the favourites, at 12-1, for last year's National at Aintree but fell at Valentine's Brook.
He has been rested since finishing ninth in the Grand Steeplechase de Paris in May, which followed his third in the Punchestown Gold Cup.
|Long Run: Career record|
|Races: 33 Wins: 15 2nd: 7 3rd: 6Earnings: £1.54m|