Riding east-to-west (out from the Nature Center), watch for the start of this trail shortly after you pass the waterfront & canoe area, on the Tunnel Trail
This trail starts out pretty wide (nearly doubletrack width) and open. As it begins to ascend the park's huge rock outcrop (the "rock knob") the trail narrows down quite a bit. The ascent is a bit rocky (loose chunky rock), and basically straight up the fall-line (no switchbacks here!).
If you want to take in the stunning panoramic views, take the short spur on your left that takes you up even higher to the top of the bedrock. The spur to the very top is "hike-a-bike" for all but the best "trials" riders.
You'll get down very quickly, on the slightly curving (but mostly down the fall-line) descent to the meadow trail. There is an ambiguous, unsigned 'fork' about half way down the descent. The trail, as mapped here, represents taking the left fork (brings you further west towards Root Canal
(a.k.a. the Meadow Trail). If you take the right fork, however, you simply come in the pines at the Tunnel Trail