Any other trails near large population centers that are designated as open to bikes will likely lead to large volume use within a short time. Traditional users such as hikers will notice increased traffic and trail degradation due to the wear and tear of the large number of bikes. User displacement will result on high-use bike trails. Different goals for being on the same trail are incompatible. Hikers want to be undisturbed in a quiet, natural setting, while bikers are looking for an aerobic workout in a natural setting.
Environmental degradation is an increasing concern of hikers.
Deep differences as to how the land should be used are at the core of trail disputes. Constructing a separate trail corridor to reduce the environmental effects of bikes would seem to solve the trail disputes, but a relatively small core of hikers oppose bikes anywhere at Kettle Moraine State Forest - South, and a relatively small core of bikers feel that all trails should be open to bikes. Further growth in bike use will continue at Kettle Moraine. The sport is getting more popular, and expanding from a young crowd to mature and junior riders. Both user groups agree that trail corridor separation is one solution on high volume trails.