You can buy trucks with off-road or rugged terrain capabilities through car dealerships. It's also possible to research new or used off-road trucks for sale through websites such as Autotrader.com.
Examples of trucks that may be useful for off-road adventures include the Toyota Tacoma TRD Pro, the Toyota Nissan Xterra Pro-4x and the Ram Power Wagon. Truck brands offer a variety of features, and four-wheel drive are the most important feature for off-road driving. In addition, well-designed off-road wheels are important for driving a truck on rough terrain.
Visit car dealerships in your area to test drive trucks or SUV's, and ask a qualified salesperson about the off-road capabilities of the vehicles.