Class 1: Passable by stock and 2WD vehicles, improved dirt, gravel, etc.
Class 2: Scenic, touring trail ride; four-wheel drive required occasionally, some mud holes or rocks that would stop most other vehicles are traveled easily in 4WD.
Class 3: For novice and experienced drivers alike, the most fun four-wheeling you can expect to have in a stock 4x4; low range may be required often; vehicle damage is a possibility.
Class 4: Novice drivers beware; potentially dangerous situations; extra ground clearance, low gears, and minimum tire size of 33 inches recommended; rear lockers or limited slips, winches, and jacks advised due to moderate to large rocks and obstacles, vehicle damage is likely. Full-size vehicles may be limited to specific trails at this rating.
Class 4+: Not advisable for novice drivers; potentially dangerous situations; maximum ground clearance, lowest gears, and minimum tire size of 33 inches and one locker or two limited slips required; jacks and winches indispensable due to large boulders, steep inclines; vehicle damage is very likely. Full-size vehicles may be limited to specific trails at this rating.
Class 5: This is rock-buggy territory. No novice drivers; dangerous situations; maximum ground clearance, lowest gears, minimum tire size of 35 inches, and two lockers or limited slips required; jacks and winches indispensable due to large boulders and steep inclines; vehicle damage is likely. Full-size vehicles may be limited to specific trails at this rating.
NOTE: SNOW and/or ICE CHANGES EVERYTHING. The simplest trail becomes a 4+ when there is ice, or the snow is three foot+ deep.
