Reading a Colorado Motor Vehicle Use Map

A route that looks open on a phone screen may be closed to motor vehicles, limited to a particular machine width, or available only during certain months. Colorado’s Motor Vehicle Use Maps can help you check what is legally open on Forest Service land, but their symbols and notes are easy to misread. This guide explains how to find the right map, interpret it, and plan a ride without relying on guesswork.

What a Colorado Motor Vehicle Use Map Shows

The map is a travel rule, not just a trail guide

A Motor Vehicle Use Map, usually shortened to MVUM, is an official U.S. Forest Service map showing roads, trails, and areas designated for motor vehicle use on a specific national forest or ranger district. It helps answer a practical question: where may you ride a motor vehicle on the land covered by that map, and under what conditions?

That makes an MVUM different from a recreational trail map. A trail map might show routes, terrain, campgrounds, scenic points, or places to explore. An MVUM focuses on designated motorized access and the restrictions that apply. A route drawn on a different map—or displayed in a phone app—is not proof that it is open to your machine.

An MVUM also covers only the management area identified on the map. A ride near a forest boundary could cross onto Bureau of Land Management land, private property, or land managed by another agency. You may need different maps and rules for each portion of the trip. When planning around an area such as the San Juan Mountains or Grand Mesa, check the land manager for every segment, not just the trailhead.

What an MVUM does not tell you

An MVUM is not a complete recreation guide or a promise that a route is easy, scenic, or suitable for your vehicle. It may not show every feature you need to navigate, such as detailed terrain, water crossings, current trail damage, or an easy place to turn around. It also does not necessarily tell you whether a road is comfortable for a beginner or appropriate for a wide side-by-side.

A route’s presence on the map does not remove the need to follow signs, gates, closures, and other posted restrictions. Conditions can change after a map is produced. A washout, fire, maintenance project, or emergency closure may affect access even when the map still shows a route. Treat the map as a key planning document, then check for current notices from the responsible land manager before heading out.

The map also does not replace other requirements. Riders may need a valid Colorado OHV registration or permit depending on the machine and where it will be used. A route shown as open does not automatically permit riding off the marked route, crossing private land, or entering a closed area. For the distinction between designated access and other permit questions, see [Colorado Permit Rules on Public Land] and [Reading a Colorado OHV Regulation Brochure].

Find the Correct Map Before You Plan

Identify the land manager and map area

Start by identifying where you intend to ride and who manages that land. The Forest Service manages national forests and grasslands, but a riding area may also include BLM land, state land, county roads, private property, or a town route. A single day’s ride can cross several boundaries, so “I’m riding in a national forest” may not be specific enough to find the right map.

Look for the name of the national forest and the ranger district or other map coverage listed by the agency. Colorado areas such as the Gunnison National Forest, Grand Mesa National Forest, and San Juan National Forest have distinct map coverage and route networks. Check the map title and coverage before using it. A map for a nearby district can be visually convincing and still omit the exact road you plan to take.

For BLM-managed ground, look for the appropriate BLM travel or access map rather than assuming a Forest Service MVUM covers the area. County and municipal rules may apply to public roads outside federal land. If your route connects a trail to a town, check local restrictions as well as the federal map. Topics such as [Finding Your Colorado County's OHV Ordinance] and [Colorado Rules on Forest Service Roads] can help you think through those jurisdiction changes.

Choose an official paper or digital copy

The Forest Service provides MVUMs through its official channels, often as downloadable PDFs. Paper copies may also be available through agency offices or visitor locations. Use the latest map available for the specific area, and check its title block, publication information, and accompanying notes rather than relying on a saved file of unknown age.

A digital MVUM can be useful because a georeferenced PDF may display your location when opened in a compatible mapping app. That is different from simply viewing a flat image of a map. Before leaving home, confirm that the file works in the app you plan to use, that the map is stored offline, and that your device can still show your position when cellular service disappears.

Apps such as onX Offroad can make it easier to view routes alongside terrain and other navigation information, but an app display should not replace checking the official agency map and current notices. Compare the route and restrictions against the controlling map. If the app and official map appear to disagree, pause your plan and confirm the route with the land manager rather than treating the more convenient display as the final word.

Learn the Legend Before Reading Routes

Decode the line styles and symbols

The legend is the map’s instruction manual. Read it before zooming in on individual roads. Line styles, colors, and symbols may distinguish motorized routes from other features, or indicate that a route is open only to certain vehicle classes. The exact meaning comes from that map’s own legend, so do not assume a symbol means the same thing across every map or app.

A common mistake is to see a line and conclude that it is an open OHV trail. It may instead represent a non-motorized route, a road closed to public motor vehicles, a route with a seasonal restriction, or a feature included for context. Find the legend entry for the line you are following and trace the route carefully. If the route line is faint or crosses several symbols, zoom in or use a paper copy with enough detail to distinguish them.

Pay attention to the map’s notes and explanatory text too. A small note can define a vehicle class, describe a seasonal restriction, or explain how a route designation works. Don’t skip the map margins just because the main map looks clear. When you are unsure, compare the line on the map with the legend and the written restrictions before planning to ride it.

Understand vehicle classes and width limits

Some maps distinguish routes by the type or size of vehicle allowed. A route open to motorcycles or narrower vehicles may not be open to a full-size ATV or side-by-side. Width restrictions matter because machines that look similar on a map can have very different dimensions, particularly when accessories, tires, or other modifications affect the vehicle’s overall width.

Check your vehicle against the map’s definitions, not just the name you use for it. “UTV,” “side-by-side,” and “OHV” are common everyday terms, but the map may use a specific class or width measurement. Confirm the relevant measurement for your machine and compare it to the map’s allowance. If your machine is near a stated limit, don’t rely on a rough estimate or a guess based on stock specifications.

This is especially important when planning a route that links wider roads with narrow trails. A route network may appear connected, but one restricted segment can make the full loop unsuitable for your machine. For a broader look at vehicle fit on Colorado routes, see [Colorado Trails Rated for Full-Size Vehicles] and [Wide Side-by-Sides on Narrow Mountain Trails]. Even when a route is legally open to your machine, assess whether its width, surface, and exposure are within your group’s ability.

Map information	What to check	Why it matters
Route line and legend	The exact meaning of the line style	A line may not mean the route is open to your vehicle
Vehicle designation	The permitted vehicle class or width	A route may be too restricted for an ATV or side-by-side
Seasonal note	Opening and closing dates or conditions	Access can change during the year
Map title and coverage	Forest, district, and area shown	The map may not cover your whole ride
Map notes	Exceptions and special restrictions	Important limits may appear outside the main map
Current notices	Closures, hazards, or temporary orders	A printed map may not reflect a recent change

Read Seasonal Dates and Special Restrictions Carefully

Treat opening and closing dates as route rules

A route may be open only during a defined season or date range. That restriction is not merely a suggestion about snow or comfort; it may determine whether motorized use is allowed. When a date range appears on the map, read it exactly and note whether it applies to the route you plan to use.

Do not assume that a road is open because it looks dry at the trailhead or because a nearby route is being used by other riders. Mountain conditions vary with elevation, aspect, and recent weather. One section may be snow-free while a shaded stretch remains muddy or closed. A route’s listed season and any current closure notice take priority over your impression from the parking area.

For longer trips, check the seasonal status of each route segment, not just the first road out of camp. A loop may cross elevations or districts with different restrictions. If your plan depends on reaching a pass or connecting to another area, build in an alternate route in case snow, a gate, or a closure blocks the connection. For broader seasonal planning, see [Colorado's High-Altitude Riding Season] and [Colorado Mud Season Closures From April to May].

Separate seasonal designations from temporary closures

An MVUM describes designated motor vehicle use, but temporary closures can also be issued. A route that is normally open may be closed due to fire danger, storm damage, maintenance, wildlife concerns, or another management need. Closures may be posted on signs or announced through agency channels after the map was published.

Before departure, look for alerts or closure orders from the agency responsible for the land. Confirm that the notice applies to your specific route, not simply the broader recreation area. If you arrive and see a closed gate or sign that conflicts with what you expected, do not ride around it. Turn back and use a legal alternative.

It helps to write down the name or number of the routes in your plan. “We’re heading to the high country” is difficult to verify against a closure notice; a route identifier or known junction is much easier. Keep a backup route that stays within the area you have checked. The relevant map and current closure information work together: one helps establish the designated network, while the other may explain what is restricted today.

Plan the Route Beyond the Lines

Use terrain and navigation information alongside the MVUM

An MVUM tells you about designated motorized access, but it may not provide the terrain detail you need to navigate comfortably. Pair it with a suitable topographic map, trail information, and route-finding tools. Look for elevation changes, steep grades, creek crossings, exposed sections, and junctions where it would be easy to take the wrong turn.

A route that appears short on a map can take far longer than expected in the mountains. Loose rock, narrow shelves, washouts, traffic, or a slow-moving group can change the pace. Give yourself room to stop and reassess rather than trying to reach a destination by a self-imposed deadline. Ask whether everyone in the group is comfortable with the hardest section, not just the easiest miles.

Digital tools can help orient you, but prepare for dead zones. onX Offroad may be useful for viewing your position and comparing route context, especially when maps are downloaded before leaving service. Still, carry a backup navigation option and know how to read it. A phone with an empty battery or an app without offline data is not a dependable route plan.

Confirm connections, access points, and boundaries

Trace your planned ride from the actual staging area to the destination and back. Check every junction where you intend to turn, and confirm that each connecting segment is designated for your machine. A route can look continuous at one zoom level while crossing a closure, a restricted trail, or a boundary where another agency’s map applies.

Think about the first and last miles too. Getting from a campground, cabin, or trailer parking area to an open route may involve private roads or town streets. An MVUM does not grant permission to cross private property, and it does not automatically authorize riding on public roads outside the map’s coverage. Confirm access at the place where you plan to unload, and verify the rules for any road connection. Guides such as [Colorado Trailhead Parking and Staging] and [Dispersed Camping Near a Trailhead] address other practical parts of getting to a ride.

Tell someone your general plan and expected return time, especially if you are riding in a remote area. Save the map offline, note key junctions, and keep enough fuel and supplies to handle a delay. If the route becomes more difficult than expected, turning around is a sound decision—not a failed outing.

Use the Map Responsibly on the Ground

Stay on designated routes

An open route is not an invitation to make a new one. Stay on the route designated for your vehicle and avoid riding around muddy sections, obstacles, or other vehicles by creating a parallel track. Shortcuts can damage vegetation, widen trails, and lead riders into areas that are not open to motorized use.

At a fork or junction, stop long enough to confirm where you are and which line matches your map. If you cannot identify the correct route, do not keep riding in the hope that the next turn will make things clearer. Backtrack to a known point if it is safe, then check the map, signs, and available route information. A wrong turn can take you onto a closed track or beyond the area covered by the map.

Respect gates, closure signs, and barriers, even if they appear inconsistent with a line on your copy of the map. They may reflect a newer temporary restriction or a boundary that is difficult to see on the map. If something appears to be permanently misposted, record the location and contact the land manager rather than moving or bypassing the sign.

Expect route conditions to differ from map details

A map shows route designation, not a guarantee of surface condition. A road can be open and still have loose rock, deep ruts, sharp switchbacks, steep grades, or exposure that makes it challenging. In Colorado, high elevation can add its own complications: weather can change quickly, engines may behave differently, and riders can tire sooner than expected.

Assess the route as you go. Keep a safe following distance so you have room to stop, and avoid crowding a rider who is negotiating a steep or uneven section. If the trail becomes unsafe for your machine or the least experienced person in the group, turn around where it is safe to do so. The map helps you decide where motorized use is designated; your judgment and preparation help determine whether the ride makes sense for your group.

Leave room for other trail users and protect the route for the next person. Reduce speed around people, livestock, and homes, and avoid excessive dust where it can affect others. Stay on the marked track and pack out what you bring in. For more on riding with care, see [Stay The Trail Ethics in Colorado].

A Practical MVUM Checklist for a Colorado Ride

Before you leave home

Start with the area, vehicle, and route rather than opening an app and following whatever line looks appealing. Identify the land manager, download the correct official map, and read its legend and notes. Confirm the route is designated for your machine, then check date restrictions and current closures.

A useful planning routine is to save more than one form of navigation. Store the map offline on your phone or GPS device, and carry a paper backup if practical. Mark the staging area, planned turns, fuel considerations, and a point where you can safely turn around. If your ride crosses agency boundaries, gather the maps and rules for each section.

Also confirm that the machine’s paperwork and equipment are in order for the ride you have planned. Map access and vehicle compliance are separate issues. If you are unsure whether your machine needs registration or a permit for the area, review [Colorado Permit Rules for Designated Trails] and [Colorado OHV Permits for Out-of-State Riders] as applicable.

At the trailhead and during the ride

Before unloading or starting out, read posted signs and check for gates or local notices. Make sure the map on your device is displaying the correct area and that location tracking works offline. Compare your starting point to the map rather than assuming the nearest visible road is the route you intended.

At junctions, confirm your location before continuing. Watch for changes in signage, surface, and route markings, and be willing to stop if the map and ground do not match. Never use another rider’s presence as proof that a route is open; they may be lost, operating under different permissions, or on a different type of vehicle.

When you finish, note any map discrepancies, damaged signs, or conditions that could help other riders and land managers. Report concerns through the appropriate agency channel and avoid sharing a shortcut that leaves the designated route. The goal is not simply to get through the day’s ride; it is to return safely while keeping access open and the route in good condition.

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.