Measuring Up to a 50-Inch Trailhead Gate

A machine that fits comfortably on a wide forest road may still be too wide for a trail with a 50-inch limit. That mismatch can turn a planned ride into a frustrating turnaround at the gate. This guide explains how to measure an ATV or UTV, check the route’s restrictions, and avoid relying on a catalog number that may not match your machine as equipped.

What a 50-inch trail limit means

A 50-inch restriction is a limit on the width of the machine allowed on a particular trail or trail segment. It does not mean every New Hampshire trail has the same limit, and it does not mean every ATV or UTV under that width can ride every route. Access also depends on the trail’s current designation, seasonal status, and any local rules.

This is especially easy to overlook when planning a ride in an unfamiliar area. You might see a promising route on a map, load your machine, and drive north—only to find a width sign at a trail entrance. Checking before you leave is much easier than trying to find another route or staging area after you arrive.

The limit applies to the route, not just the machine type

A trail may have a width restriction because of the surface, bridges, gates, landowner conditions, or the way that route is managed. A nearby trail can have a different rule. Even within a connected system, a machine that is allowed on one section may not be allowed on the next.

That makes a route-wide check important. A short connector between two larger trails can be the point where a wider machine has to stop. Don’t assume that a machine’s general classification as an ATV or UTV answers the access question; look for the restrictions attached to the actual route you intend to ride.

For a broader explanation of how these limits affect rail trails, see Why Rail Trail Caps Machines at 50 Inches. If you’re comparing a specific route with your machine’s width, also review New Hampshire Trails With a 50-Inch Limit. Treat posted signs and current trail information as essential, rather than assuming that an old map or a friend’s past trip reflects today’s conditions.

A gate is a warning, not a measuring tool

A trailhead gate can look wider or narrower than it really is, particularly when you’re judging it from the driver’s seat. The gate opening also may not be the only narrow point. A trail could have a restricted bridge, bollards, a tight turn, or another barrier farther along.

If your machine appears close to the stated limit, don’t try to settle the question by inching toward the gate. A tire, fender, mirror, or accessory can catch on the structure. Forcing a machine through can damage it, the gate, or the trail—and can create a safety problem for anyone behind you.

Instead, measure the machine before the trip and confirm that the trail’s width rule applies to the route you’re planning. If the fit is uncertain, choose a route that clearly permits your machine’s width. A few minutes of checking at home can save a long, disappointing drive.

How to measure your ATV or UTV accurately

The width printed in a brochure is a useful starting point, but it may not reflect the vehicle sitting in your garage. Different trim levels, tire setups, wheel offsets, and accessories can change the overall measurement. If your machine is close to the trail limit, measure the actual machine you plan to ride.

Find the widest point from side to side

Park on a level surface with the wheels pointed straight ahead. Use a tape measure to find the greatest outside-to-outside width across the machine. In practice, that may be at the tires, but it can vary with the machine and its equipment. Check beyond the tires too: fender flares, aftermarket wheels, nerf bars, mirrors, or other attachments may extend farther outward.

Take the measurement across the vehicle, not diagonally from a tire to a body panel. Ask a second person to hold one end of the tape if that makes it easier to keep the tape level and straight. Write down the measurement and note exactly where the widest points are. A quick photo showing the tape in place can help you remember how you measured it.

If you have a side-by-side, measure it in its riding configuration. A machine with added side steps or a wider wheel setup can measure differently from the same model in stock form. Don’t rely on a manufacturer’s listed width without checking whether it includes the parts fitted to your particular vehicle.

Account for changes made after purchase

A machine can become wider after modifications, even if the changes seem modest. Wheel spacers, different wheels, tires with a wider profile, and protective accessories can all affect the outermost measurement. Repairs or replacement parts may also leave you with a setup that differs from the original specifications.

For a borderline machine, measure more than once. Check the widest point with the steering straight, then look at whether the tires or other parts extend farther when the wheels are turned. The published trail rule may define how width is assessed, so ask the responsible club or land manager if you need a precise interpretation. Until you have a clear answer, don’t assume that a close fit is acceptable.

What to check	Why it matters	Practical step
Tire-to-tire width	Tires are often among the widest parts	Measure outside edge to outside edge
Fender or body extensions	Added parts may extend beyond the tires	Check both sides for the outermost point
Wheels, spacers, and tires	Modifications can change overall width	Measure the machine as currently equipped
Mirrors and accessories	Some attachments may project outward	Ask whether the trail’s rule includes them
Route restrictions	Limits can vary between nearby trails	Check the specific route and its connectors

Confirm the route before you load the trailer

A careful measurement is only half the job. You also need to confirm that your intended trail allows a machine of that width on the day you plan to ride. Trail systems can include different surfaces, managers, and restrictions, so verify the details for your route rather than relying on a general description of the area.

Check current maps and trail information

Start with the trail club or land manager responsible for the area. Look for a current map, trail-status notices, posted restrictions, and any information about width limits. If the map does not answer your question, contact the organization directly and describe your machine’s measured width and configuration.

A mapping app such as onX Offroad can be helpful when you’re planning a route and trying to understand where trails connect. Use it as a planning aid, not as a substitute for current local rules or posted signs. If an app’s line appears to continue onto a restricted segment, check with the trail organization before assuming that your machine can travel the full route.

This extra check matters in places with connected systems, including northern New Hampshire areas around Berlin, Gorham, and Pittsburg. A route that looks continuous on a screen may cross from one managed section to another. A local map, current trail-status information, and direct confirmation can help you spot a restriction before you commit to the trip.

Check the entire route, including connectors

Write down the route you plan to take and identify each segment, not just the main trail. Pay special attention to rail-trail sections, narrow access points, and connectors between trail systems. A wide machine may be acceptable on much of a ride but still be excluded from one short section that makes the route impractical.

You can use onX Offroad to organize a planned route and see how it relates to nearby trail segments, then compare that plan with the relevant club’s information. If you’re unsure which organization manages a section, ask before riding. A confident answer about the full route is more useful than guessing from a map line.

Other route details matter too. Check whether the trail is open, whether seasonal closures apply, and whether the route is intended for your type of machine. For example, New Hampshire Trail Status Before You Ride can help you think beyond width alone. Restrictions are not interchangeable: being within the width limit does not override a closure or another access rule.

What to do if your machine is close to 50 inches

A measurement near the limit deserves extra care. Tape measures can shift, tire pressure can vary, and modifications can complicate the reading. A machine that seems to fit on paper may have little or no room to spare at a barrier.

Don’t count on squeezing through

If your machine is at or near the posted maximum, don’t treat a narrow opening as a challenge to overcome. Avoid letting air out of the tires, removing parts at the gate, or using the width of the opening as proof that your machine is permitted. The trail restriction is about the allowed vehicle width, not simply whether you can physically pass a particular obstacle.

If a club or land manager can clarify how the rule applies to your machine, get that information before your ride. Give them the model, any modifications that affect width, and your own measurement. If the answer remains uncertain, select a route with a limit that comfortably accommodates your machine.

When you’re assessing options, compare the machine against the route rather than trying to make the route fit the machine. The guide New Hampshire Trails for a Wide Machine can help you look for routes that may be a better match. Always verify the specific access rules before you go.

Plan a backup route and staging option

A backup plan is valuable even when you’ve done your homework. Trail closures, weather, and last-minute access changes can disrupt a ride. Before leaving, identify another legal route or decide where you could safely stop if a connector is unsuitable for your vehicle.

Confirm that your staging location is appropriate for your trailer and machine. A parking area that works for a small ATV may be crowded or awkward for a larger rig. Don’t block a gate, driveway, or access road while trying to work out a new plan. If you reach a restriction, turn around where it is safe and follow the trail organization’s directions.

For first-time rides, it can help to save an official club map and trail contact information offline. You might also use onX Offroad to keep your intended route organized, while checking current information separately before departure. If your group includes machines of different widths, plan the route around the largest one so the group doesn’t split unexpectedly.

Use a simple pre-ride width check

Before loading up, run through these steps:

1. Measure the widest point of each machine as it is currently equipped.
2. Compare each measurement with the posted limit for every planned trail segment.
3. Confirm the route and its connectors with current club or land-manager information.
4. Check for seasonal restrictions, closures, and other machine-specific rules.
5. Choose a backup route that is suitable for the widest machine in your group.
6. Keep the measurement and route information available during the trip.

This routine is particularly helpful when you’ve changed tires or accessories since your last ride, borrowed a machine, or joined a group with unfamiliar vehicles. It also prevents a common planning mistake: checking only the lead rider’s ATV and assuming everyone else’s machine is the same width.

Common width-measurement mistakes to avoid

Trusting the model name or brochure figure alone

Two machines with the same model name can have different equipment. A trim package, accessory kit, or owner-installed modification may alter the overall width. A brochure measurement may also describe a particular configuration rather than the machine you actually own.

Use manufacturer information as a reference, then measure your own vehicle. If your result differs from the published figure, use the real-world measurement when planning. If that measurement is close to the limit, get the trail organization’s interpretation before riding.

Measuring only the body or tire tread

It’s easy to measure the body panels because they’re visible and convenient. But the widest point may be elsewhere. Measuring only the tread, rather than the outer edges of the tires, can also produce a misleadingly small number.

Take time to inspect both sides of the whole machine. Look at the tires, fenders, steps, and accessories. If you can’t tell which point is widest, measure several likely points and record the largest result. A careful measurement is more useful than a fast one that overlooks a protruding part.

Assuming every trail near a wide trail has the same limit

Trail systems can be connected without sharing identical rules. A nearby access road, rail trail, or connector might have a different width restriction or no access for your machine type. A route name or regional reputation doesn’t guarantee that every segment allows the same vehicles.

Check the whole trip, and pause at signs to confirm that you’re still on the route you planned. If you’re looking at a particular rail-trail area, Which New Hampshire Rail Trails Take Machines is a useful starting point for understanding why route-by-route checking matters. For a wider overview, see New Hampshire Trail Width Limits by Club.

A little measuring and route checking can prevent a frustrating turnaround at the trailhead. Measure the actual machine, confirm the full route with current local information, and choose a comfortable margin when the width is close to the limit. That way, the gate is just another trail marker—not the place where the day’s ride ends.

Disclaimer

This article is for general informational purposes only and does not constitute professional advice. Laws, prices and regulations vary by location and change over time. Consult a qualified professional for guidance on your specific situation.