Bay hit the summit on Tuesday night after an impressive home win over Nomads.
Elliott Bullock opened the scoring on 16 minutes before Logan Summer added a second with 35 gone, Luca Moran assisting.
Freddie Naylor made it three in the 48th minute, Bullock this time the supplier, and that clinched the points.
A shock first defeat of the season for Llandudno as Denbigh took the honours thanks to a double from net-machine Rhys Lloyd, who is now on 27 goals for the campaign.
Lloyd netted on 28 and 69 minutes for the visitors, Sam Parry with a late reply for Tudno – his 28th of the season.
Sub Seth Evans rescued a point for Ruthin with an 89th minute equaliser.
Sion Williams put the visitors ahead in the eighth minute, but Rhys Evans levelled on 58 and sub Alexander Cooper looked to have won it for the Colliers when he converted a penalty after 86, but that late twist was in store.
Fraser Dodd (2), Oliver Sell, Sam Jones, Cayden Hazeldine, Joseph Davies and Rhys Chester all joined in the scoring spree as Mynydd Isa slammed seven past Buckley.
Riley Thomas (2), Morgan Flavell and Cian Hughes made sure Llanrwst edged the honours at Maes Tegid, Bala replying through Beau McKeown, Luca Beck (pen) and a Gruffudd Ap Gwyndaf own goal.
All-square at Halkyn Road, Lewys Williams, Josh Acott (2) and Cian Davies splitting the home haul, Dylan Cusato (2), Caiden Baker-Williams and Kacper Bury (pen) earning a point for the Wingmakers.
Airbus led 2-0 and 3-1, but ended up having to come from behind through Bury’s 59th minute spot-kick to bag a draw.
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