With Conwy Borough drawing 3-3 at home to St Asaph on Friday night, Llanrwst Utd knew that 3 points would take them top of table and two points clear.
Greenfield were the visitors to Gwydir Park, a team that will certainly be challenging towards the top of the table come the end of the season.
With the adverse weather conditions affecting Gwydir Park during the week, Llanrwst Utd tried to switch the game to Greenfield, but to no avail. The groundsmen worked tirelessly all week and all credit must go to them that the game went ahead.
The Rwsters were missing experienced defender, Richard Orme and forward Aron Hughes from the squad whilst Greenfield were also missing a couple of key players, Centre back Liam Jones and winger Tom Carney.
The first fifteen minutes went by with no real action to note, Greenfield unable to convert a couple of free kicks in dangerous positions.
On 20 minutes, home debutant Mike Lundstram showed his class by dropping off Dean Hughes and playing a 30 yard ball to Callum Parry who beat Danny Stanton and finishing from a tight angle. 1-0.
Llanrwst nearly double their lead five minutes after, Chris Beardmore intercepting a Greenfield pass, he found Hedd Williams who's wonderful cross was met by Lundstram but his header went wide of the post. HT
Half Time might have come at the wrong time for the Rwsters as they were pressing for the second goal.
The second goal of the game did come in the way of the Rwsters. Again, the combination down the right, Lundstram to Callum Parry who's cross was met perfectly by Elliot Llewelyn, a bullet header Into the top corner. 2-0
Greenfield then put Llanrwst under some pressure, Sam Jones gave them some hope after he was alert by intercepting a poor back pass before rounding keeper Loui Harris. 2-1.
Substitute Morgan Owen made an immediate impact as his corner was met by Captain Leighton Griffiths, Stanton making a point blank save but Callum Parry was on hand to tap in the rebound.
It got even better on 84th minute, Morgan Owen's powerful run down the left hand side, found Mike Lundstram who slid in for his second goal in as many games for the Rwsters.
Barry Owen's men weren't finished yet, Lundstram finding substitutes Tom Casey and Sam Tidswell, who combined well with the latter hammering an unstoppable effort in from twelve yards.
Winning Manager Barry Owen commented: The boys knew if we managed to win today against a top side in Greenfield, we'd be top of the league.
I couldn't be prouder of the way we managed the game, and how ruthless we were in front of goal.
Llanrwst Utd Reserves also maintained their unbeaten start to the Vale of Clwyd and Conwy Division One league with an impressive away win at Title Favourites Rhuddlan Town. Bryn Jenkins scoring two and an own goal sealing the 2-3 win.