The main road into the forest from Frodsham/Liverpool end is being resurfaced starting Monday, possibly taking 3 to 4 days. It’s the section between where Ashton Road joins and the forest boundary.
There’ll be a diversion in place that apparently will go via Weaverham because they don’t want HGVs down the small roads. So if you use a Satnav the diversion should be much shorter.
Should be fine if you are coming from the Abbey Arms end, but if you want to park on Ashton Road (skills area etc) you’ll have to go via the Mouldsworth end.