Womack races in to lift pressure
Castleford were within a score of beating the league runners-up until Sheffield winger Alistair Womack raced over for his second try with three minutes remaining.
Heath have finished in third despite going down 27-15 in their final match at Dinnington.
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Hide AdDinnington were 10-8 down at the interval but fought back with three second-half tries.
North Ribblesdale also ran in four tries as they moved up one position to sixth with a 28-12 home win over Ilkley.
Knottingley moved up three places to eighth, passing their rivals in the process, when they ran out 41-26 home winners over Bridlington.