36 CFR § 261.55 - National Forest System trails.
§ 261.55 National Forest System trails.
When provided by an order issued in accordance with § 261.50 of this subpart, the following are prohibited on a National Forest System trail:
(a) Being on a trail.
(b) Using any type of vehicle prohibited by the order.
(c) Use by any type of traffic or mode of transport prohibited by the order.
(d) Operating a vehicle in violation of the width, weight, height, length, or other limitations specified by the order.
(e) Shortcutting a switchback in a trail.