Whitworth secured promotion to the ChromaSport & Trophies United Counties League Premier Division after an emphatic 5-2 success at Lutterworth Athletic.
The victory secured the runners-up spot behind Division One champions Daventry Town and means James Mallows’ team will be playing top-flight football next season.
Jordan Pendered was the hero for the Flourmen as he hit four goals and Jack Dyson added the other as Whitworth completed a comfortable victory.
They round off a superb campaign, which has seen Mallows guide them to elevation in his first season in charge, with a local derby at Irchester United on Monday (11am).
Raunds Town completed their season with a nine-match unbeaten run as their final league game saw them win 1-0 at Potton United thanks to Dave Townsend’s early goal.
The Shopmates will finish seventh in the table if Irchester don’t beat Whitworth tomorrow.
But James Le Masurier’s men can now look forward to the NFA Junior Cup final, which sees them take on Northants Combination Premier Division champions JK Blisworth at Sixfields on Tuesday, May 2 (7.45pm).
Burton Park Wanderers finished bottom of the pile as their last game of the campaign saw them beaten 3-0 by Melton Town at Latimer Park.
On Friday night, Thrapston Town completed their season with a fifth win in a row as they saw off lowly Stewarts & Lloyds 3-0 at Chancery Lane. The Foundrymen round off their campaign with a trip to Oakham United on Monday.
Wellingborough Town made it a magnificent seven wins in a row as they took the local bragging rights with a 2-1 success at Premier Division rivals Rothwell Corinthians.
Adam Speight and Justin Dowling were on target for the Doughboys as they saw the game out after Corinthians had scored a late goal.
Wellingborough entertain Cogenhoe United on Monday while Corinthians head into another deby at Desborough Town, who claimed a fine 4-2 success at Harborough Town on Friday night.
Dan White, Jason Turner’s penalty, Jake Bettles and John Dean secured the points for Ar Tarn, who remain on course for a fine top-five finish.