A trailer is disclosed. The trailer may be pulled behind a vehicle such as, but not limited to, a jeep, dune buggy, or ATV. Embodiments of the trailer may include a frame and an adjustable suspension. The adjustable suspension may be used to vary the height of the trailer in order to accommodate different types of terrain and loading. By changing the height, the clearance and/or approach angle of the trailer may be varied. Additional embodiments may include a tongue connected to the frame, which tongue may have an adjustable length and/or height. Where the trailer includes a cover and a tailgate, an optional locking system may be used. In one embodiment, the locking system includes a handle that may release both the tailgate and cover. In some embodiments, the handle may be partially pulled to release the cover while fully pulling the handle may release the tailgate.