4. Lincoln Woods, Rhode Island. Lincoln Woods State Park features a 15-mile system of bike trails with both easy and moderate riding conditions. Bikers can also utilize the main park road. The trails are shared use, so watch for hikers and horseback riders.

5. Turkey Mountain, Oklahoma. Turkey Mountain Urban Wilderness is located along the west bank of the Arkansas River. Trails are shared use and feature steep, rocky hillsides and heavily wooded surroundings.