Vehicle

Rating

Description

Stock 4x4 with at least All-Terrain tires.

1

Graded dirt road. Dry, or less than 3" water crossing depth. Gentle grades. 2WD under all conditions except snow. No width problems, two vehicles wide.

2

Dirt road. Dry, or less than 3" water crossing depth. Some ruts. Slight grades, up to 10 degrees. 2WD under most conditions. Rain or snow may make 4WD necessary. Usually 1.5 to 2 vehicles wide.

3

Dirt road. Rutted, washes, or gulches. Water crossings up to 6" depth. Passable mud. Grades up to 10 degrees. Small amount of mud, rocks or holes. 4WD recommended but 2WD possible under good conditions and with adequate ground clearance and skill. No width problems for any normal vehicles. Vehicle passing spots frequently available if less than 2 vehicles wide.

4

Rutted and/or rocky/muddy road. Water crossings usually less than hub deep. Passable mud. Grades moderate, up to 15 degrees. Side hill moderate up to 15 degrees. 4WD under most conditions. No width problems, vehicle passing spots frequently available if less than 2 vehicles wide.

At least one locker/limited slip or winch with aggressive 31" or larger tires (Not All-terrains). Slight body damage could occur.

5

Rutted and/or rocky/muddy/light muskeg. Rocks/ruts up to 12" and water crossings up to 12" with possible currents. Passable mud. Moderate grades to 15 degrees. 6" holes. Side hill to 20 degrees. 4WD required. No width problems.

6

Quite rocky, medium muskeg or deep ruts. Rocks/ruts to 12" and frequent. Water crossings may exceed hub depth with strong currents. Mud may require checking before proceeding. Moderate grades to 20 degrees. Side hill may approach 30 degrees. 4WD necessary and second attempts may be required with stock vehicles. Caution may be required with wider vehicles.

Body damage possible.

7

Medium muskeg and/or frequent rocks/ruts to 12" and may exceed hub height. Holes frequent or deep (12"). Mud 8" deep and may be present on uphill sections. Grades to 25 degrees and side hill to 30 degrees. Water crossings to 18" and may have strong currents. 1 to 1.5 vehicles wide. 4WD required. Driver experience helpful.

8

Heavy muskeg/heavy rocks and/or severe ruts. Rocks/mud exceeding hub height frequently. Deep mud or uphill mud sections. Steep grades to 25 degrees and can be loose/rocky/muddy. Water crossings may exceed 30" in depth. Side hill to 30 degrees. One vehicle wide. Body damage possible. Experience needed. Vehicle modification helpful.

Body and mechanical damage likely.

9

Severe rock over 15" or muskeg. Frequent deep holes over 15". Mud bog conditions (long, deep, no firm bottom). Over 30" water crossings with strong currents. Steep grades over 30 degrees. Side hill over 30 degrees. May not be passable by stock vehicles. Experience essential. Body damage, mechanical breakdown, and rollover probable. Extreme caution required.

10

Severe conditions. Extreme caution recommended. Impassable by stock vehicles. Winching required. Trail building necessary. May be impassable. Impassable under anything but ideal conditions. Vehicle damage probable. Personal injury possible. Extreme caution necessary.