Leeds (26) 76
Tries: Donald, Hall 5, Webb 2, Smith, Leuluai, Lauitiiti, Burrow, Peacock, Ratu Goals: Sinfield 10
Castleford (6) 12
Tries: Chase, Evans Goals: Westerman 2
Rob Burrow (left) celebrates with Hall after one of the latter's five tries
Leeds ran riot with 14 tries to secure an emphatic win over play-off challengers Castleford and claim their biggest-ever victory at Headingley.
England winger Ryan Hall caused all sorts of problems with five tries, including a first-half hat-trick.
Brent Webb notched a double as the Rhinos looked consistently dangerous.
Lee Smith, Kylie Leuluai, Rob Burrow, Jamie Peacock, Michael Ratu and Ali Lauitiiti also crossed, while Kevin Sinfield kicked 10 goals.
The Rhinos opened the scoring in devastating fashion when Burrow's 40-20 kick led to a period of pressure and Danny McGuire broke forward and sent Donald in at the corner, although Sinfield missed the extras.
Castleford responded in impressive style and James Evans wiped out the Rhinos' lead four minutes later with a try converted by Joe Westerman.
But five minutes later Hall touched down in the corner to restore his side's advantage and when he scored his second try two minutes later, Leeds were starting to show their strength.
Webb showed clever footwork and pace to weave over for his side's fourth and Hall completed his hat-trick on the stroke of half-time after being set up by Keith Senior.
The Leeds bandwagon continued after the break with Smith finding the pace to go over but Castleford snatched their second score on 49 minutes when Rangi Chase touched down.
It was only a brief respite as Leuluai powered over and Sinfield converted for his 1,000th career goal before Hall raced over 80m to cross the line.
Webb then went over for his second try and Burrow and Peacock also touched down before Hall claimed his fifth try - his 25th of the season.
Ratu and Lauitiiti completed the punishment in what was an embarrassingly one-sided encounter in the closing stages.
Leeds coach Brian McClennan:
"We kept our composure and our discipline and we kept on playing. That was the really pleasing aspect.
"We just wanted to have a really strong attitude about us and be really aggressive.
"It gives us a bit of confidence because we played like we know the Rhinos can and it was good fun.
Castleford coach Terry Matterson:
"We gave up. We've worked hard at this place to build on things but it wasn't good what happened here.
"We've got to find out why and move on. I really feel for the fans.
"From 20 minutes onwards, our defence was appalling. I didn't think it could get any worse but it did. There is no place for anyone to hide, the team performance was terrible."
Leeds: Webb, Donald, Smith, Senior, Hall, McGuire, Burrow, Leuluai, Diskin, Peacock, Jones-Buchanan, Ablett, Sinfield.
Replacements: Lauitiiti, Burgess, Worrall, Ratu.
Castleford: McGoldrick, Ford, Shenton, Evans, Wainwright, Widders, Chase, Sargent, Hudson, Huby, Ferres, Clayton, Westerman.
Replacements: Jones, Higgins, Feather, Netherton.
Referee: B Thaler (Wakefield)