m1kea. there is a singletrack descent that follows your blue line from the barns next to the fire road (between the field and fire road) that is superfast an fun. dont go down hte steep stuff at the end as thats the wrong way to the next bit! where you have a red blob and turn 90degree right continuee onwards straight to ride the singletrack downhill through the trees on the east of the park again adjacent to the fire road, (its location is a bit of a mish mash just after the turning but its on the rhs of the fire road further down) through the gates, into more singletrack and it pops you out just above the uni car park.
lovely jubbly. its my extended commute home :-).
you`ll be knackered and have a massive grin before you even start the ride.
the second part of singletrack is best ridden as hard as possible. if you mince its a bit crap with no flow.
oh and watch out for sniper stumps. the trail pixies seem to like leaving 6″ sticking out hte ground for reasons best known to themselves.
*looks at clock, looks at window, its my birthday, work can wait* i`m off up there now