Been out today and would suggest having a Plan B just in case, as it will be SLOW. It took me 2 1/2 hrs to do a normally very steady 1 1/2 hr ride. A fair bit of pushing through snow and on some sheet ice stretches.
My route was: up A666 from Darwen to Entwistle. Nipped in and along the top track running parallel with Greens Arms Rd then out and along the Rd for a bit. Turned down track towards Turton Tower. Right @ Golf club. Out onto Cox Green Rd. Right to A666. behing Barrrocco's. Through the backs to end of Catherine's Edge. Then all the way along Catherine's Edge to the Rd. This was one of the hardest stretches as about 1/3 of it was unrideable. Along to The Royal and then turned off and back to Darwen. Ice, ice baby!