System used on 4x4wire.com.
|2WD Easy||0||Graded dirt or gravel road.|
Vehicles: Any vehicle, including passenger cars.
|4WD Easy||1||Unimproved dirt road, 4wd and extra clearance may or may not be needed, street tires ok.|
Vehicles: Any 4wd, high-clearance pickup trucks with 2wd.
|4wd Easy +||2||4wd needed, some low range, suitable for novice drivers, street tires ok.|
Vehicles: Any 4wd, including stock SUVs.
|4WD Moderate||3||4wd low range required, difficult terrain, some steep grades but no major rock obstacles, trail tires needed but stock suspension ok, challenge for novice drivers.|
Vehicles: Any modified 4wd, stock SUVs with trail tires.
|4WD Challenging||4||Difficult trail, with obstacles, can be done with a stock vehicle with a very experienced driver but not recommended. This is the limit of a stock SUV. Occasional off-camber situations, some steep grades, may be water crossings or sand hazards.|
Vehicles: 31 inch tires, at least a mild lift, rear locker or limited slip.
|4WD Hard||5||Difficult trail. Grades and off-camber situations may exceed 25 degrees, water crossings 2 feet deep, lots of rock crawling, body damage possible.|
Vehicles: Modified with lift, hard locker, 31 inch tires minimum.
|4WD Hard+||6||Tough trail. Lots of rocks, grades and off-camber situations may exceed 30 degrees, winch may be needed. Body damage or equipment failures likely. |
Vehicles: 2 to 4 inch lift, 33" tires, locker in rear, limited slip or locker in front, winch, extra gears.
|4WD Extreme||9||Very tough trail. Lots of rocks, grades and off-camber situations may exceed 30 degrees, winch may be needed. Body damage or equipment failures likely. |
Vehicles: 4 inch lift or more, 35" or mre tires, lockers front and rear, winch, extra gears.
Note: Trail ratings are highly subjective. A trail that is easy for an experienced driver with a highly modified vehicle may be impassable for a novice driver in a stock vehicle. Weather conditions may also significantly affect the difficulty of a trail. Also, the difficulty of a trail may change over time, as trail use, weather, and maintenance modify the trail. Always check with the managing organization and/or recent users before planning a trip on a trail and scout ahead on foot if you are not sure of current conditions.