there's 2 other cheeky trails u can try.
Climbing upto mast from bottom of britney spears, after about 100 metres the tree line ends, you can
1/. At the first post, metres before the first tree line ends, theres a cheeky downhill trail with nice switchbacks that starts by going through an 'alcove' made by the trees on the right hand side. Nice and rocky to begin with, then switchbacks. At end of switchbacks go straight (instead of left) and it takes you onto the black trail ( beware, that grassy bit is very holey)
2/. After the first tree line ends(about 10 metres just as the trail slightly veers right then left) if you look upto your right (3 O'clock position ), theres the top of the grassy climb. There's a walkers path up to there. Head up there and follow trail, down some nice switchbacks, through the trees and some other bits of climbing and downs. Its a walkers trail but very nice on the bike. Ends on the red trail leading upto spooky