Yes, its bike legal. Thats a new section of the Pinhoti network. The best way to use it, is do the normal Bear creek, being for most, its an 'in and out' up the main trail...to the lookout...then up to the upper TH, then back down the switchbacks, and then back down the way you came. But when you get to that trail again(just after the creekcrossing past the Poplar)..take a right(up)on the new trail. It goes aprox(I have not been on it yet, but was just up there riding last Thursday and talked saw/talked to the local bike shop owner being Mike at the Carticay bike shop, and asked this very question. We had a tired dog with us, so we didn't do the trail/FS rd mileage) 4 extra miles, sorta up and over the ridgeline...heading back towards the same FS road that goes up to the lookout. Ride it to the FS road, then just turn left and smoke back down it and too your car, since you had already otherwise ridden most all the singletrack back down to the lower TH anyway. He said the trail is beautiful, and well worth the effort. Adds about 5 more miles to the ride for 17 miles, which is badly needed IMHO.
Duck
<img src="http://www.fototime.com/ftweb/bin/ft.dll/standard?pictid={4483D64E-1AAC-4E52-93A0-E61AA626C0C8}">
<img src="http://www.fototime.com/ftweb/bin/ft.dll/standard?pictid={B89C8907-041B-46A6-BDFF-05A4C3DB4CD4}">