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Trail Requirements
Trail Rating System
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Trail Rating System
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 one and a half to two vehicles wide.
3 Dirt road. Rutted, washes, or gulches. Water crossings up to 6" depth.
Passable mud. Grades up to 10 degrees. Small rocks or holes. 4WD recommended but
2WD possible under good conditions and with adequate ground clearance and skill.
No width problems for any normal vehicle. Vehicle passing spots frequently
available if less than two vehicles wide.
4 Rutted and/or rocky road. No shelves but rocks to 9". 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 two vehicles
wide.
5 Rutted and/or rocky road. No shelves. Rocks 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 or deep ruts. Rocks to 12" and frequent. Water crossings
may exceed hub depth with strong currents. Shelves to 6". Mud may require
checking before proceeding. Moderate grades to 20 degrees. Sidehill may approach
30 degrees. 4WD necessary and second attempts may be required with stock
vehicles. Caution may be required with wider vehicles.
7 Rocks frequent and large, 12" and may exceed hub height. Holes frequent
or deep (12"). Shelves to 9". Mud 8" deep and may be present on uphill sections.
Grades to 25 degrees and sidehill to 30 degrees. Water crossings to 18" and may
have strong currents. 1-1/2 vehicles wide. 4WD required. Driver experience
helpful.
8 Heavy rock and/or severe ruts. Rocks exceeding hub height frequent.
Shelves to 12". Deep mud or uphill mud sections. Steep grades to 25 degrees and
can be loose or rocky. Water crossings may exceed 30" in depth. Side hill to 30
degrees. One vehicle wide. Body damage possible. Experience needed. Vehicle
Modifications helpful.
9 Severe rock over 15". Frequent deep holes over 15". Shelves over 15".
Mud bog conditions (long, deep, no form bottom). Over 30" water crossings with
strong currents. Steep grades over 30 degrees. Sidehill over 30 degrees. May not
be passable by stock vehicles. Experience essential. Body damage, mechanical
breakdown, 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.
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