I live in the Sandhills of NC, so I have to travel a couple hours at least to get to a mountain. I usually look for loop trails with lots of small hills when I'm hiking for exercise. Can anybody suggest tough trails in Central NC for this purpose? These are the ones I'm already using
Raven Rock Park, Lillington
San-Lee Park mountain bike loop, Sanford
Birkhead Mountain Wilderness, Asheboro
Uwharrie National Forest figure 8, Troy