The Jackfork Mountain Bike Trail at Pinnacle Mountain State Park is new - the trail opened in October 2010, and it hasn't been completely worn in yet. The trail is about seven and a half miles long, and is basically an intermediate trail - once it's ridden in, it should be closer to beginner-intermediate.
Hikers and trail runners can use the Jackfork trail, but both should yield to mountain bikers.
