Trails That Open Mid-May
A mid-May opening can be a welcome excuse to plan a Black Hills ride, but an open date does not mean every trail is ready or every route is available. This guide explains what “open mid-May” means for South Dakota ATV and UTV riders, how to check a specific route, and how to prepare for spring conditions before unloading your machine.
What mid-May trail openings mean in South Dakota
The May 15 opening is a starting point, not a blanket reopening
Some motorized trails in the Black Hills open for the season around May 15 and remain available into December, subject to conditions and closures. That date is useful for planning, but it should not be treated as a promise that every trail, road, or riding area is open that day. Different routes can have different seasonal schedules, and weather or other management needs can affect access.
The Black Hills National Forest has a large network of roads and trails, but only routes designated for motorized use are appropriate for a ride. A road visible on a map is not automatically an ATV or UTV route. Check the route’s designation and seasonal dates before you go, rather than assuming that a nearby trail shares the same opening schedule.
Some trails have later seasonal openings, including routes that open in mid-August. That distinction matters if you are planning a longer loop: a route may be open on one side of a trail junction while the connecting route remains closed. For more on the seasonal schedule, see [Trails Open May 15 to December 15] and [Trails That Wait Until Mid-August].
Why spring conditions can change your route
The calendar does not tell the whole story. A trail that is scheduled to open in mid-May can still be muddy, rutted, or difficult after snowmelt and spring rain. Shady slopes and higher elevations may hold snow or ice longer than exposed lower ground. A stretch that looked dry near a trailhead may become slick or soft a short distance into the forest.
Riding through wet ground can also deepen ruts and damage the trail surface. If you find standing water, saturated soil, or a section that your machine is cutting up, turning around is often the better choice. It may feel frustrating to backtrack after preparing for a ride, but forcing a route can make conditions worse for other riders and can increase the chance of getting stuck.
Before leaving, look for official notices about closures and conditions. A seasonal opening date is not a substitute for checking current route information. [South Dakota Trail Closures to Check First] explains why a final check matters, while [Why Weather Closes a Black Hills Trail] covers how conditions can affect access even during the riding season.
How to confirm a trail is open
Match your route to the official map
Start with the motorized-use map for the area you plan to ride. In the Black Hills, a Motor Vehicle Use Map, often called an MVUM, helps identify routes where motorized travel is allowed and can show seasonal restrictions. Read the map carefully: a route’s line, route number, allowed vehicle type, and operating dates all matter.
If you are planning a loop, verify every connecting segment, not just the trailhead or the first road. For example, you might find that the route out of a staging area is open but a side trail you hoped to use is not yet available. A paper map or downloaded map can also be useful where cell service is weak, but it should be one you have checked against the latest official information before leaving.
Digital tools such as onX Offroad can help you review route options and keep a map available on your phone. Use it as a planning aid, not as a replacement for official motorized-use maps, posted signs, or closure notices. Save the information you will need before you lose service, and be ready to change plans if a gate or sign shows a closure that conflicts with your route plan.
Check notices again before the ride
Make a short pre-ride check part of your routine. Confirm that your intended routes are open, check for temporary notices, and look for information about weather-related restrictions. If you are staying near Rapid City, Deadwood, Spearfish, Hill City, or Custer, do this check for the riding area you will actually use; conditions can differ across the Hills.
At the trailhead, read any posted signs before unloading. Pay attention to seasonal dates, vehicle restrictions, and instructions about staying on designated routes. If a route is signed closed, do not ride around a gate or try to find an informal bypass. A closure can apply even when the ground looks dry and passable.
It helps to have a backup route selected before you leave. Save it in your map app or mark it on a paper map, and tell the group what the alternative is. That way, a closed trail or muddy section becomes a manageable change of plan rather than a rushed decision at a junction. For broader planning help, see [South Dakota Trail Maps and MVUMs] and [South Dakota Trail Conditions Before You Ride].
Planning a safe and enjoyable May ride
Prepare for a mix of spring weather and trail surfaces
Mid-May in the Black Hills can feel like spring in one spot and much colder a few miles away. Dress in layers, bring rain protection, and pack gloves and warm clothing even if the forecast looks comfortable in town. Wind, shade, elevation, and a wet trail can make a ride feel colder than expected, especially after a long stop or if you get delayed.
Expect surface changes. You may encounter dry gravel, damp soil, loose rock, muddy patches, and lingering snow or ice in shaded areas. Reduce speed when visibility or traction changes, leave room between machines, and avoid sudden braking or sharp turns on slick ground. If your group includes less-experienced riders, choose a route with room to turn around and avoid committing to a difficult climb just because it appears open on the map.
Spring is also a good time to carry more than the bare minimum. Bring water, basic first-aid supplies, a tool kit suitable for your machine, a tire repair option, and a way to contact help. Make sure everyone knows the route and the meeting plan if the group gets separated. Cell service can be inconsistent in the Hills, so download maps before departure and do not assume a phone will work everywhere.
Choose routes that fit your machine and group
Trail width can shape your options. Some trails are limited to narrower vehicles, while others allow wider machines. Measure your vehicle’s width as specified by the applicable trail guidance, and confirm that your intended route accommodates it. A side-by-side that is comfortable on a wide forest road may not be permitted on a narrower trail. See [South Dakota Trail Width Limits] and [How South Dakota Measures Trail Width] before choosing a route.
Your group’s experience matters just as much as vehicle size. A short, familiar route with easy turnarounds may be a better first spring ride than a long loop with steep grades and few exit options. If you are riding with children or newer operators, plan for breaks and keep the pace comfortable. Let the least experienced rider set the rhythm rather than pressuring them to keep up.
A practical route check can help you compare plans:
| What to check | Why it matters | What to do |
|---|---|---|
| Seasonal opening date | Routes can open on different schedules | Confirm each segment, including connectors |
| Official motorized designation | Not every visible road is open to motorized use | Check the current MVUM and posted signs |
| Recent weather | Rain, snowmelt, and cold can affect trail conditions | Look for notices and be willing to reroute |
| Vehicle width | Some trails restrict wider machines | Compare your machine’s measured width with route limits |
| Cell coverage | Service may be unreliable away from towns | Download maps and share your plan beforehand |
| Group ability | Spring surfaces can be slick or uneven | Pick a route with a manageable distance and turnaround options |
A simple mid-May pre-ride routine
The day before you go
Choose a primary route and a backup that both fit your vehicle and group. Check seasonal dates and official notices for each, then save the relevant map information offline. If you use onX Offroad to review route options, confirm the route against official forest maps and current signs rather than relying on a single digital layer.
Check the forecast for the riding area, not only the town where you are staying. A sunny forecast in Deadwood does not guarantee the same conditions at a higher, shaded trail. Adjust clothing and gear for rain, cool temperatures, and delays. If recent weather has left the ground saturated, consider postponing or choosing a route known to be suitable for the conditions.
Tell someone where you plan to ride and when you expect to return. If your plan changes, update them when you can. A simple itinerary is especially useful when the group is riding beyond reliable phone coverage or splitting into separate machines.
At the trailhead and on the route
Before starting, take another look at posted signs and any gates. Confirm that the route is open and that your machine is allowed. If anything differs from your plan, stop and make a new decision before proceeding. A few minutes spent checking can prevent a much longer, stressful ride back.
Ride at a pace that leaves room to react. Keep a safe following distance, avoid passing where visibility is limited, and stay on designated routes. If a section is muddy or visibly being damaged by traffic, turn around rather than widening the trail to find firmer ground. On a spring ride, protecting the route and avoiding a recovery situation are both good reasons to be flexible.
When you return, check your machine for mud packed around moving parts and inspect tires, lights, and other equipment before hauling home. If the trail has been particularly wet, clean the machine before transporting it to help avoid carrying mud or seeds to another riding area. For more seasonal planning, see [South Dakota Riding in Spring] and [When an Early Snow Closes a Black Hills Trail].
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.
