Long Run is a retired National Hunt racehorse owned by Robert Waley-Cohen and trained during his racing career by Nicky Henderson in Great Britain and later by his owner.

In January 2011, ridden by amateur jockey Sam Waley-Cohen, the son of owner Robert Waley-Cohen, Long Run won the weather-delayed 2010 King George VI Chase at Kempton Park ahead of stablemate Riverside Theatre in second and Kauto Star, who was aiming to win the race for a record fifth time, in third.

On Boxing Day 2012, Long Run, who was the favourite at 15/8, won the King George VI Chase at Kempton.

[5] Long Run also participated in the 2014 Grand National at Aintree, but fell at the Valentine's Brook on the first circuit.

He followed up with a ninth-placed finish in the Grand Steeple-Chase de Paris in May 2014 but was then off the course until March 2016 when he reappeared in a hunter chase at Carlisle.