You find a trail on an app. It says “Difficulty: 5.” Is that something your stock Tacoma can handle? Or is it a trail that eats axles for breakfast?
Trail difficulty ratings matter. The difference between a 3 and a 6 can be thousands of dollars in damage — or a call for a tow truck on a trail where tow trucks don’t go. But most apps and guidebooks don’t explain what the numbers actually mean.
Let’s fix that.
The Rating System
Most offroad trail rating systems in the US are based on or adapted from the National Wheeling and Pioneering Society (NWPS) scale, which runs from 1 to 10. Some apps and guidebooks use simplified versions (easy/moderate/hard), but the 1-10 scale gives you the detail you actually need.
Here’s what each level means, what vehicle can handle it, and some well-known trails at each level so you can calibrate your expectations.
Ratings 1-3: Stock Vehicles Welcome
Rating 1 — Maintained Gravel Road
What it looks like: Graded gravel or dirt road. Smooth surface, gentle grades. Think county road that just happens to not be paved.
Vehicle needed: Anything. Sedans, minivans, your grandma’s Camry. 2WD is fine.
Examples:
- Most National Forest main roads
- Valley of the Gods Road, Utah
- Cades Cove Loop, Great Smoky Mountains
Rating 2 — Easy Dirt Road
What it looks like: Unmaintained dirt road with some ruts, washboard sections, and loose gravel. Minor obstacles you can drive around. Higher clearance helps but isn’t always required.
Vehicle needed: Any SUV, crossover, or truck. AWD or 4WD recommended but not required in dry conditions. 7+ inches of ground clearance helps.
Examples:
- Most BLM access roads
- Shafer Trail switchbacks (paved), Moab
- Typical forest service roads rated for passenger vehicles
Rating 3 — Moderate Dirt Road
What it looks like: Rougher dirt road with embedded rocks, deeper ruts, moderate washouts, or sand sections. Some obstacles require picking a line. Occasional steep grades.
Vehicle needed: SUV or truck with 4WD and 8+ inches of clearance. Stock 4Runners, Tacomas, Wranglers, Broncos — all fine. Even a stock Subaru Outback can handle most 3-rated trails in dry conditions with careful driving.
Examples:
- Mineral Bottom Road, Moab (before the switchbacks)
- Schnebly Hill Road, Sedona
- Most forest service roads rated for high-clearance vehicles
Ratings 4-5: Modified Vehicles Start to Shine
Rating 4 — Moderate Offroad Trail
What it looks like: The road is now a trail. Expect larger rocks, deeper ruts, off-camber sections, water crossings, and steeper grades. You’ll need to pick lines carefully. Some sections may cause a stock vehicle to scrape.
Vehicle needed: 4WD with low range is strongly recommended. Stock 4x4 trucks and SUVs can handle it with careful driving, but a 2-inch lift and skid plates make it more comfortable. All-terrain tires minimum — no highway tires.
Examples:
- Broken Arrow Trail, Sedona
- China Wall, Moab
- Imogene Pass, Colorado (most sections)
Rating 5 — Moderate-Difficult
What it looks like: Larger obstacles that can’t be avoided. Ledges up to 1-2 feet, off-camber tilts, narrow sections with exposure, deeper water crossings. You’ll use low range the entire trail. Spotters are helpful.
Vehicle needed: 4WD with low range required. A lift (2-3 inches), 33”+ tires, and skid plates are strongly recommended. Stock vehicles can make it but will scrape, and you’ll work hard for every section. A locker helps but isn’t mandatory.
Examples:
- Fins & Things, Moab
- Poison Spider Mesa (main route), Moab
- Engineer Pass, Colorado
- Poughkeepsie Gulch, Colorado (before the shelf road)
Ratings 6-7: Built Vehicles Required
Rating 6 — Difficult
What it looks like: Significant obstacles are the norm. Ledges of 2-3 feet, large boulders, tight switchbacks requiring multiple-point turns, steep rocky climbs, potential body damage sections. Every obstacle requires a planned approach.
Vehicle needed: Modified 4x4 required. 3+ inch lift, 35” tires, front and rear lockers, skid plates, rock sliders, and recovery gear. A spotter outside the vehicle is strongly recommended for multiple sections.
Examples:
- Hell’s Revenge, Moab
- Pritchett Canyon (upper section), Moab
- Black Bear Pass descent, Telluride
- Rubicon Trail (easier sections), California
Rating 7 — Very Difficult
What it looks like: The trail is trying to break your vehicle. Ledges over 3 feet, boulder fields, extreme off-camber, tight squeezes between rocks, mandatory winch points for some vehicles. Body damage is likely even on well-built rigs.
Vehicle needed: Purpose-built offroad vehicle. 35”+ tires, significant lift, lockers front and rear, winch, full armor (sliders, skid plates, diff guards, rocker protection). A spotter is essential. Running alone is risky.
Examples:
- Pritchett Canyon (full trail), Moab
- Rubicon Trail (main obstacles), California
- Poison Spider/Golden Spike combo, Moab
Ratings 8-10: Extreme — Proceed With Caution
Rating 8 — Expert
What it looks like: Every obstacle is consequential. Massive ledges, near-vertical climbs, extreme off-camber where a rollover is possible, mandatory winching. Vehicle damage is almost guaranteed. Trails at this level often have sections where turning around isn’t an option — you’re committed.
Vehicle needed: Purpose-built rock crawler or heavily modified rig. 37”+ tires, coilover suspension, front and rear lockers, winch with synthetic line, full cage or reinforced cab, hydraulic steering. Experience matters more than equipment at this level.
Examples:
- The Maze, Moab (hardest lines)
- Carnage Canyon, Moab
- Backdoor, Farmington, NM
Rating 9 — Extreme Expert
What it looks like: Single-vehicle-width passages between rocks, vertical or near-vertical wall climbs, extreme exposure with hundreds-of-feet drops, obstacles that test the physical limits of traction and articulation. Multiple winch points per mile.
Vehicle needed: Competition-grade rock crawler. 40”+ tires, one-ton axles, doubler transfer cases, onboard air for airing down to single-digit PSI. This is specialized equipment territory.
Rating 10 — Competitive/Theoretical Maximum
What it looks like: The hardest terrain a wheeled vehicle can theoretically traverse. This rating is rare outside of rock crawling competition courses and a handful of natural trails that most people will never see.
Vehicle needed: Purpose-built competition buggy.
A Few Things Ratings Don’t Tell You
Weather Changes Everything
A trail rated 4 in dry conditions can become a 6 or 7 after rain. Mud, wet rocks, and water crossings can transform a moderate trail into a serious challenge. Always check recent weather and trail conditions before heading out.
Your Experience Matters More Than Your Rig
A skilled driver in a stock 4Runner will outperform a novice in a $100,000 build on trails rated 5 and above. Line selection, throttle control, and knowing when to stop are skills that no amount of modifications replace.
Ratings Vary Between Sources
A trail rated 5 on one app might be rated 4 on another. There’s no universal standard, and different rating systems emphasize different factors. Some weight technical difficulty, others weight exposure or consequences of failure.
Apps like Trail Scout and Trails Offroad include vehicle modification recommendations alongside their difficulty ratings, which gives you more context than a number alone.
The Hardest Section Sets the Rating
A trail rated 6 might be mostly 4-level terrain with one 6-rated obstacle. If you can bypass that obstacle, the effective difficulty drops. Read the full trail description, not just the number.
How to Use Ratings Wisely
- Start one level below your comfort zone. If you think your rig can handle a 5, run some 4s first. Build experience before building your trail list.
- Read the full trail description. The number is a summary. The description tells you what specific obstacles to expect.
- Check recent trip reports. Trail conditions change. What was a 4 last year might be a 5 after a washout.
- Go with experienced people. Running a trail rated above your experience level is dramatically safer with a spotter and a friend with a winch.
- Know your out. Before starting a trail, know where the bailout points are. Some trails are point-to-point with no easy turnaround.
The rating number is a starting point, not the full story. Use it to narrow your options, then do your homework before you hit the trail.