i used to live on the tourne...literally. i could walk out my backyard cut up the hill behind the condos about 100 yards and be in the trails. man, did i take that for granted. anyway...
the tourne is a great little spot that, as mentioned above, does get a decent amount of foot traffic on nice days/weekends. that said, for it's size it offers A LOT. tight single track, rocky climbs, smooth double track and the famed fire road climb to the top of the tourne. with a little creativity and a double back here and there you can get a good 12 or 13 miles out of it.
while it's not a destination park, if you live in denville you'd be foolish not to take advantage of it for a quick pre or post work ride.