An extra time winner at the Novus Stadium helped Kidsgrove through in the third qualifying round replay on Wednesday night.
The initial contest finished 0-0 at Borough Park last Saturday and it was 0-0 at the break in the replay.
But it was the Reds who eventually broke the deadlock on the hour-mark when Sam Joel leapt highest following a corner to power a header past Dom Kurasik.
Grove didn't have to wait long for their equaliser though as 8 minutes later, defender Lewis Bergin spotted Workington 'keeper Aaron Taylor off his line and lobbed the ball 45-yards over the backtracking Taylor.
Workington thought they had won it at the death as Conor Tinnion struck the post a minute into stoppage time
So, it was to extra-time, and the only goal came in the 100th minute when Anthony Malbon played through Rumieno Valido-Barai, who showed a turn of pace before slotting home under Taylor to give Grove victory.