The Iron Mountain Bike Trail along DeGray Lake near Arkadelphia, when completed will be about 26 miles long. It offers a nice adventure ride that can be done in sections, or the entire length depending upon your physical ability. Historic Washington State Park is exactly that-an entire town that happens to be a state park. Washington was an important stop along the rugged Southwest Trail to Texas. It's also the home of the legendary Bowie knife. The Yellow Rock Trail at Devil's Den State Park offers magnificent views in all directions from atop Yellow Rock itself.