I don't know about England but some of the northern routes in the Clwyd's are near Mold - how's that for you? Check out http://www.ridetheclwyds.com for routes, and also the NE Wales Bikefax (tho some of the routes are in the book and on the website). I went out on a North Wales MBA ride last night which started at Mold Leisure Centre - a good bunch of guys, happy to wait around for the slower people, and a good route even though we started from the town!
I think theres MTB routes round Delamere forest as well but I haven't tried it out yet....
I guess that Llandegla is a bit far for you on a weeknight - it's open till 9pm tues/wed/thurs.
I'm on holiday from saturday for a week, but maybe we can meet up the week after?
Cheers, l.