You can do a good few miles over Clent once you know the layout of the area. There are basically 2 main hills each of which having multiple routes up/down allowing you to do many ‘circuits’ taking in the best of both.
I went up there on Sunday night and did 4 circuits of Clent and 2 of Walton hill without ascending/descending the same trails twice – 2500ft of climbing (including the ride from Blakedown). It’s a pretty good area if you are local or work near the area as it’s so convenient and quiet in the evenings.
It’s pretty boggy on the West Hagley side of the hill at the moment as it takes a week or so for the water to drain off the hill and another week to dry out completely.
I tend to be over there late evenings (from 7:30 – 8ish) if you want to be shown the sites.