The trails were built as to not waste the elevation gain that it takes to get to Wonderland. Oz is way better than going down the pavement. The trail is about as difficult and as long as another trail, Heart Attack (ride it!!), but it has more crazy downhill short cuts, as the terrain is really steep. There is at least one section that is a steep uphill that you're going to have to walk but I think the trail is worth it.
How to get there:
The trail runs from the power line to the Dragon lake boat launch. The best way to find the trail is to ride Wonderland and then once you get back to the powerline head north on the road(towards start of Wonderland). Continue until the approach to the big hill, here you should see a rock cairn. Cut acros the powerline, follow the trail and cross the marshy area(it looks really wet, but it isn't) ,go up the bank to the trailhead.