South Dakota Trail Maps and MVUMs
A map can show a tempting line through the Black Hills and still leave you unsure whether your ATV or UTV is allowed there. That confusion is understandable: trail maps, Motor Vehicle Use Maps, and navigation apps serve different purposes. This guide explains how to read each one, check seasonal access and vehicle-width limits, and plan a ride without relying on a single map.
What South Dakota trail maps and MVUMs tell you
A trail map is useful, but not always a permission slip
A trail map helps you see where routes run, how they connect, and where you might start or end a ride. Depending on who made it, it may show forest roads, motorized trails, recreation areas, trailheads, fuel stops, or nearby towns. That makes it useful for building an itinerary, especially when you are trying to estimate whether a loop fits your day.
But a line on a map does not automatically mean you can ride it. A general trail map may include roads that are closed to motorized use, routes with seasonal restrictions, or roads that are open only to certain vehicle types. Some maps also simplify boundaries or omit recent closures. Treat a trail map as a planning tool, then confirm that each proposed route is open and appropriate for your machine.
This distinction matters around the Black Hills, where a route may pass through a mix of public land, private property, and different kinds of roads or trails. A route that looks connected on a screen may not provide continuous legal access. Before setting out, check the relevant land manager’s current information and make sure the route is open for the type of riding you plan to do. For broader route-planning context, see [Where to Ride an ATV in South Dakota].
What a Motor Vehicle Use Map does
A Motor Vehicle Use Map, often shortened to MVUM, is a Forest Service map that identifies routes designated for motor vehicle use on the national forest it covers. In South Dakota, riders commonly consult the map for the Black Hills National Forest when planning a ride there. It is not simply a scenic overview: it helps distinguish designated motorized routes from roads or trails that are not open to public motor vehicle use.
An MVUM may communicate important details such as which routes are open, what vehicle types or widths are permitted, and whether access is limited to particular dates or seasons. Those details can be conveyed through symbols, notes, and a map legend, so do not assume that a route is open just because its line is visible. Read the explanatory material alongside the map, including any notes about dates and vehicle restrictions.
An MVUM is not a complete guide to every riding opportunity in South Dakota. It applies to the lands and routes covered by that map, and it may not answer questions about state-managed areas, private land, or roads outside the national forest. Use the map for the area it governs, then check the rules for any other property or riding area on your itinerary. [South Dakota Rules for Riding Federal Land] explains why the land manager matters.
How to use the main map types together
Think of your maps as serving different jobs. A general riding map gives you an overview. An MVUM helps you verify designated Forest Service routes and restrictions. A navigation app can help you follow your position while riding, particularly where roads branch or landmarks are hard to distinguish. None of those tools should be treated as a perfect replacement for the others.
| Map or tool | Best use | What to verify before riding |
|---|---|---|
| General trail map | Seeing the wider riding area and planning a route | Whether each route is open to your vehicle and on which land |
| Forest Service MVUM | Checking designated motorized routes on the covered national forest | Legend, vehicle restrictions, seasonal dates, and map coverage |
| Navigation app | Following your location and route in the field | Offline access, map coverage, closures, and whether the route matches official information |
| Posted signs and notices | Checking conditions and restrictions at a site or access point | Whether signs indicate a closure, restriction, or change from your plan |
You might use an app such as onX Offroad to help visualize roads and track your location. That can be convenient, especially when you have downloaded the relevant maps before leaving cell service. Still, use the official MVUM and land-manager notices to verify whether a route is designated and open. A helpful screen display is not the same thing as authorization to ride.
How to read an MVUM before choosing a route
Start with the map legend, dates, and coverage
Before tracing a route, check the map title and coverage area. Make sure you have the correct map for the land you plan to ride, rather than a nearby district or an older map covering a different part of the forest. Then read the legend and any explanatory notes. Symbols can look similar at a glance, and the legend is where the map explains what they mean.
Next, look for date restrictions. Some routes may be open only during a designated season, while others may be subject to a different schedule or temporary closure. The dates printed on a map are important, but conditions can change because of weather, fire, maintenance, or resource concerns. The map is a key planning document, not a promise that every route will remain open in every condition.
It is also worth checking where the map’s boundaries end. If your planned ride crosses into another jurisdiction or leaves the national forest, you need the rules and access information for that next area. Do not assume the same route designation carries across a boundary. A little extra checking at home can prevent an awkward turn-around after you have unloaded the machines.
Check vehicle-width rules against your actual machine
A route that allows some motor vehicles may not accommodate every ATV or UTV. Width limits can determine whether a machine may use a particular trail, so measure your machine rather than relying on its model name or the width listed in a sales brochure. Accessories, tires, or other modifications can affect the measurement relevant to route restrictions. For practical guidance, see [How South Dakota Measures Trail Width].
This is especially important for side-by-sides. A route that works for a narrower ATV may not be open to a wider UTV, and a map may divide routes into categories based on width. A group can easily overlook this if everyone assumes “motorized trail” means “open to all machines.” If riders are bringing different machines, compare each one with the route restrictions before choosing a shared loop.
If the width measurement is close to a stated limit, do not round down or make a guess based on how the vehicle feels on the trail. Confirm how the restriction is defined and measured, and choose an alternate route if the machine does not clearly qualify. [South Dakota Trails Under 62 Inches] offers a focused look at one common width category.
Follow route designations rather than drawing your own connection
A route that looks like a shortcut on a screen may be an undesignated road, a closed trail, or a route that is not open to the vehicle you are riding. When planning, trace the route along designated lines and check every junction. Avoid joining two legal segments with an assumed connector unless you have confirmed that the connector is open to your machine.
This is where careful map reading pays off. A dashed line, a change in line style, a nearby boundary, or a gap in a route can be easy to miss when zoomed out. Look closely at each turn and compare your proposed path with the legend. If you are unsure whether two lines meet legally, plan a different loop or contact the relevant land office before riding.
For a more dependable trip plan, mark the route you intend to follow, the points where you can turn back, and a few alternatives. You can also use onX Offroad to keep your position visible while you ride, but check that the app’s route information agrees with the official map. Keep a copy of the official map available offline or in print so your plan does not depend entirely on a phone signal.
Plan around seasons, closures, and changing conditions
Seasonal dates are part of the route
A route may be designated for motorized use but still be closed during part of the year. Seasonal access dates can differ by route, so do not assume that every trail in an area opens and closes together. The map legend and route notes are the starting point for understanding scheduled access, and land-manager notices help you check for changes that affect your travel dates.
The Black Hills riding season is not a single blanket permission covering every road and trail. Some routes may have one opening period and others another. If you are planning a spring ride or visiting late in the season, check the dates carefully before you load the trailer. Related information is available in [South Dakota's May to December Trail Season], [Trails Open May 15 to December 15], and [Trails Open August 15 to December 15].
Even within an open season, a route can be affected by weather or a temporary closure. A wet spring, heavy rain, fire danger, or maintenance work may change what is practical or allowed. If a trail is muddy or damaged, riding it can worsen the surface and create problems for other users. Check for current notices shortly before departure rather than relying only on the plan you made weeks earlier. See [South Dakota Trail Closures to Check First] and [South Dakota Trail Conditions Before You Ride].
Build a closure check into your trip routine
A useful closure check takes place in stages. First, check official information while planning the trip so you can choose an area and route. Then check again shortly before leaving, when temporary closures or changing conditions may have been posted. Finally, look at signs and notices at the trailhead or access point. If a posted sign conflicts with your plan, respect the sign and use a legal alternative.
This routine helps avoid a familiar frustration: reaching a trailhead after a long drive and discovering that your main route is unavailable. Keep a second option in mind, but verify that it is open too. A nearby route is not automatically a suitable substitute if it has different vehicle restrictions, a seasonal closure, or limited access.
Navigation apps can support this process but should not be the only source you consult. An app may help you locate a trailhead or see where you are, while an official notice explains a closure or restriction. If you use onX Offroad, download the maps you expect to need before leaving reliable service and compare your planned route with the relevant official information. For context on map use in the field, see [Reading a Black Hills Travel Map].
Weather and terrain can make an open route a poor choice
Legal access is only one part of choosing a route. A road that is open may still be unsuitable for your group because of mud, loose rock, steep grades, poor visibility, or a recent storm. Conditions can vary across the Black Hills: a route that feels manageable in dry weather may be much more demanding after rain or snow. Plan according to the least experienced rider and the capabilities of the least capable machine in your group.
Ask practical questions before committing to a route. Is there a safe place to turn around? Can the machine handle the climb or surface? Will you have enough daylight to finish? Can you reach fuel or assistance if the route takes longer than expected? These questions matter more on remote roads, where a minor delay can become stressful if you have no backup plan.
Let current conditions change your itinerary. If a route is soft, blocked, or difficult for your group, turning around is a reasonable decision—not a failure to complete the ride. [Why Weather Closes a Black Hills Trail] explains why a route may be unavailable even when it appears on a map, and [South Dakota Trail Closures to Check First] is useful when reviewing your alternatives.
Make maps work in the field
Prepare for limited cell service
Do not count on having a dependable data connection throughout a ride. Before leaving town, download any app maps you plan to use, save the route details you need, and make sure you know how to access them without a connection. Check that your phone is charged and that the downloaded area covers the entire route, including likely detours or turn-around points.
A paper map can be a sensible backup. It does not run out of battery, and several riders can look at it together when deciding where to go. A printed or saved MVUM is particularly useful when you need to check a route designation or restriction. Store it somewhere it can be reached without unpacking everything, and keep it protected from water and dust.
The best setup is usually more than one tool: an official map for route rules, an offline navigation option for orientation, and a basic plan shared with everyone in the group. onX Offroad may help with navigation and route visualization, but it should complement rather than replace the official map and notices. Before the ride, make sure every driver knows the intended route and the plan if the group gets separated.
Use trailheads and signs as confirmation points
A numbered or signed trailhead can help you confirm that you have reached the right starting point. Compare the sign with your map before unloading or beginning the route. If the location does not match your plan, pause and check rather than assuming you are close enough. [Starting at a Numbered Forest Trailhead] covers the value of using trailhead information as part of your navigation.
Signs along the route can provide important local information, including closures or restrictions. Do not treat them as decoration or assume that the map overrides a clearly posted restriction. If you encounter a closed gate or a sign you do not understand, stop and determine what it means before continuing. If you cannot confirm that the route is open to your machine, choose a route you can verify.
It also helps to note landmarks and junctions as you go. A group that knows it should turn at a particular marked intersection is less likely to follow a tempting but unverified spur. Keep the pace comfortable enough to read signs and consult the map safely. Trying to navigate quickly while moving over uneven terrain can create avoidable risks.
Share the plan and leave room to adapt
Before starting, agree on the route, expected turn-around points, and what the group will do if someone has a mechanical issue or needs to stop. Make sure each rider knows the difference between the planned route and an alternate. If people are riding separate machines, agree on where to regroup after a turn or at a trailhead.
Build extra time into the day. A route that looks short on a map can take longer than expected when the surface is rough, riders need breaks, or a junction requires checking. Avoid planning so tightly that a small delay forces you to ride faster or continue after conditions have changed. A comfortable schedule leaves room to shorten the ride if weather, closures, or fatigue become a concern.
Finally, do not assume that a route shown as connected will lead to fuel, lodging, or a public road you can use. Verify those details before departure. If you are riding a broad area of national forest, the map may help you understand the scale of the road network; [3,600 Miles of South Dakota Forest Road] provides related context. The practical takeaway is to use maps to plan carefully, then remain willing to adjust when signs, conditions, or restrictions call for it.
A dependable pre-ride map checklist
Before you leave home
Start by identifying the land you intend to ride and finding the map that covers it. If your route includes Black Hills National Forest land, check the appropriate MVUM and read its legend, restrictions, and seasonal dates. If the ride crosses into another jurisdiction, check that area’s access rules separately.
Then check the dimensions and type of each machine in your group against route restrictions. This is particularly important when ATVs and UTVs are riding together. If you cannot confirm that every machine is allowed on the planned route, choose a route with clear, suitable access rather than hoping a junction will provide an answer.
Finally, check current notices and conditions, save offline navigation information, and identify an alternate plan. If the ride requires a permit, make sure you understand which area it applies to and whether your machine needs one. [South Dakota's Motorized Trail Permit] explains the permit topic separately from map interpretation.
At the trailhead and while riding
At the access point, compare the signs and location with your plan. Confirm that you are on the intended route and that no closure or restriction changes your options. Keep maps and navigation tools accessible, but stop in a safe place before studying them in detail.
As you ride, stay on routes designated for your machine. Recheck the map at confusing junctions, and do not use an unverified spur just because it appears to connect with your destination. If a route is blocked or its status is unclear, turn around or use an alternate you have already confirmed.
At the end of the ride, note any confusing signs or route conditions that affected your plan. That information can help you prepare better next time, but do not treat a past ride as proof that the same route is open on a future visit. Seasonal dates, weather, and closures can change what is available. A reliable approach is to check the official map and current notices each time you plan to ride.
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.
