With about 140 miles of trails open to mountain bikes, Mt. Hood National Forest is a great place for novices to experts. Remember that you will be sharing the trail with other users, especially hikers and riders on horseback.
Know the rules of 'right of way': The general convention for shared trails is that bikes must yield to hikers and horses.
Mountain Bike Trails around Government Camp
Columbia Area Mountain Biking Advocates (CAMBA) ...