Why Bighorn Trails Close in Spring
Spring riding plans in Wyoming’s Bighorn Mountains can run into a frustrating surprise: a route that looks close to town may still be buried in snow, muddy, or officially closed. These spring restrictions protect fragile trails and help prevent damage that can last well beyond the thaw. This guide explains why closures happen, how to check a route’s status, and how to plan a safer ride.
Why Bighorn trails close in spring
Snowmelt leaves trails vulnerable
The Bighorn National Forest’s elevation changes quickly, and spring arrives at different times on different slopes. A trail that looks rideable near Buffalo or Sheridan may climb into lingering snow and cold conditions higher in the mountains. Even when the surface appears mostly clear, melting snow can leave the ground saturated underneath.
That wet ground is the main reason a route may be closed when the weather feels pleasant. ATV and UTV tires press into soft soil, and repeated passes can deepen ruts, push water off its natural path, and widen the track as riders try to avoid muddy sections. The resulting damage does not necessarily disappear when the ground dries. Ruts can channel later rain and snowmelt, washing out soil and making a trail harder to maintain.
A closure is therefore not just about whether a machine can get through. It is also about whether the ground can bear repeated traffic without being torn up. A route that seems firm at the entrance can become soft farther uphill or in a shaded hollow. Turning around before leaving visible damage is better for the trail and safer than getting stuck in a remote, muddy section.
Snowdrifts can remain after lower routes clear
Shaded timber, north-facing slopes, and high passes may hold snow long after lower-elevation roads are open. Drifts can conceal rocks, ruts, drainage dips, and the trail edge. A machine might reach a snowbank only to find that the route beyond it is still buried or too wet to ride safely.
Snow conditions also change over the course of a day. A frozen surface early in the morning may soften after the sun reaches it, while a warm afternoon can turn a narrow crossing into a churned-up mess. A route that was passable on a previous trip may be different after fresh snowfall, wind, or a few warm days. That variability is one reason a familiar landmark or an old trip report is not enough to confirm that a route is open and suitable today.
The list of [Bighorn Roads Closed Until June] and details about [Snowdrifts on a High Forest Road] can help explain why spring access varies. Treat any month or past opening date as background, not a promise for a particular road. The conditions at the location, current Forest Service notices, and posted signs are more useful than a calendar alone.
How spring riding affects soil, plants, and wildlife
Ruts and runoff can outlast the closure
A trail’s surface is part of a drainage system. When tires cut deep grooves into saturated soil, water may follow those grooves rather than dispersing across the hillside. That can carry sediment downhill, expose roots, and damage nearby vegetation. On slopes, even a short muddy stretch can become a long-lasting erosion problem if riders repeatedly cross it.
Trying to go around a wet patch can make the damage wider. One rider moves to the edge; another follows the new track; soon the trail is wider and the vegetation beside it is flattened. This is especially easy to do when a group is focused on getting through a difficult section. If a route is soft enough that you are leaving deep ruts, the responsible choice is to stop and turn back rather than search for a firmer line off the designated trail.
Spring closures give soil and vegetation time to recover before heavier use. They also reduce the chance that trail crews will have to repair damage caused by traffic during the thaw. A closed sign is not an invitation to test the surface for yourself. Respecting it avoids additional damage and prevents a poor spring outing from becoming a costly recovery situation.
Wildlife and seasonal habitat can shape access
Snowmelt is not the only factor land managers consider. Wildlife use, nesting, calving, and other seasonal patterns can affect when or where public routes are open. The timing and location of restrictions can vary, so riders should not assume that every closure is related to mud—or that a route is open simply because the ground looks dry.
A quiet stretch of forest road may pass through habitat where animals are trying to feed or raise young. Motorized traffic can add disturbance, particularly when riders leave designated routes, approach wildlife, or make repeated passes. Staying on signed, authorized roads and trails helps limit that impact. It also reduces the chance of accidentally entering an area subject to a separate seasonal restriction.
The Bighorns are not uniform from one drainage or district to the next. A route near a familiar trailhead may be open while another area has a wildlife-related restriction. Check current notices for the specific location you intend to ride, and follow signs at the trailhead even if a digital map appears to show a continuous route. For broader context, see [Wyoming Rules for Riding a National Forest] and [Wyoming Trail Closures to Check First].
How to check whether a Bighorn route is open
Use official maps and current notices together
Before leaving home, identify the actual route you plan to ride and check the applicable Forest Service information for that area. Forest travel maps and Motor Vehicle Use Maps, often called MVUMs, help distinguish routes designated for motorized use from tracks that may be closed or unauthorized. They also help you understand that access is route-specific: being on national forest land does not automatically mean every visible road or trail is open to ATVs or UTVs.
Maps and closures answer different questions. A travel map can show whether motorized use is designated on a route, while a current closure notice may describe a temporary restriction. Neither should be treated as a substitute for posted signs on the ground. If a gate, closure sign, or barricade contradicts your expectation, do not ride around it. Stop and verify the route rather than assuming the sign is outdated.
Digital tools can make trip planning easier, but check their information against official sources. Some riders use onX Offroad to study route networks and locate trail access before setting out; it can be a useful planning aid, but it should not overrule a current closure notice or a sign at the entrance. The guide to [Wyoming Trail Maps and MVUMs] covers why map reading matters, especially when roads and trails intersect or appear to connect.
| What to check | What it helps you confirm | What it cannot confirm by itself |
|---|---|---|
| Current Forest Service closure notice | Whether a temporary restriction applies to a route or area | Whether conditions have changed since the notice was issued |
| Motor Vehicle Use Map | Which routes are designated for motorized use | Whether a designated route is temporarily closed |
| Trailhead signs and gates | Local access restrictions and on-site instructions | The status of every route farther into the forest |
| Digital mapping app such as onX Offroad | Route planning and general orientation | Legal access or the latest closure status unless verified |
| Recent local conditions report | Snow, mud, or access concerns reported by others | Whether a specific route is officially open |
Ask about the route, not just the general area
“Are the Bighorns open?” is too broad a question to get dependable trip-planning advice. Conditions can differ between a low-elevation road, a high pass, and a shaded trail in the same general region. When checking with a ranger district or another official contact, ask about the specific road or trail name, the access point, and the direction you intend to travel.
It also helps to describe the machine you plan to bring. A narrow ATV may fit on a route where a wider side-by-side does not, and some trails have width restrictions. Confirm that the route is open to your vehicle type, not merely open to some form of motorized travel. If you are unfamiliar with local route names, use a map to identify the entrance and nearby landmarks before making the call.
Riders approaching from Buffalo and Sheridan may be looking at different access points and elevations, so route details matter. The guides to [Riding the Bighorns From Buffalo] and [Riding the Bighorns From Sheridan] can help frame those different starting areas. Do not rely on a general conversation, an old social-media post, or a line drawn on an app as final permission to ride.
How to plan a spring ride without getting caught out
Build a flexible route and a turnaround plan
Spring is a poor time to plan a ride that depends on one high route being open. Choose a primary route and a lower-elevation alternative, then decide in advance what conditions will make you turn around. For example, if the trailhead is blocked by snow, the ground is soft, or signs show a seasonal closure, switch plans rather than pressing on in hopes that the route improves farther ahead.
Tell someone where you are going and when you expect to return, especially if your route is remote or cell service is uncertain. Carry enough food, water, warm layers, and basic repair supplies to handle a delay. Early spring mountain weather can change quickly, and a short ride can take longer if snow, mud, or a mechanical issue slows your group down.
Planning with onX Offroad or another mapping tool can help you compare route options and note access points before you leave. Save the map information you need for offline use where available, but bring or consult official route information too. A phone battery, signal, or app display should not be your only way to understand where you are or whether motorized travel is allowed.
Match the ride to the machine and the conditions
A route that is appropriate for one machine may not be suitable for another. Before setting out, check posted width limits and confirm that your ATV or UTV fits the designated route. Keep in mind that a machine’s overall width can include accessories such as mirrors, racks, or tires, so measure the setup you will actually ride rather than relying only on the model’s advertised dimensions.
Spring mud can also turn a manageable route into a recovery problem. Heavy side-by-sides may sink deeply in soft ground, while smaller machines can still cause serious trail damage if riders spin their tires or keep trying to climb through saturated sections. Carrying a winch or tow strap does not make a closed or fragile route suitable for riding. Equipment helps with emergencies; it does not remove the need to follow access rules or protect the trail.
If your group includes different vehicles, choose routes based on the least suitable machine, not the most capable one. Keep space between machines on soft ground, avoid aggressive acceleration, and do not ride outside the designated track to pass a muddy patch. For related guidance, read [Wyoming's 50-Inch Trail Limit] and [Which Wyoming Trails Are Held to 50 Inches].
What to do when a route is closed
Respect signs and avoid bypassing barriers
A closure sign or gate is the clearest instruction you will encounter at the route. Do not ride around a barrier, squeeze past a sign, or use a nearby track as a workaround. The alternate-looking track may be unauthorized, and riding around the closure can damage vegetation or create a new route that other riders later mistake for an approved trail.
If you see conflicting information—for example, an app showing a route line while a sign says it is closed—follow the on-site closure and seek clarification from the responsible land manager. If a route appears open on an official map but has a temporary closure posted at the entrance, do not treat the map as permission to continue. A map may show general designation while signs communicate a current restriction.
Take note of the sign or gate location and the route name so you can ask a clear question later. Do not remove or move a closure marker. A closure may protect a stretch that is difficult to see from the trailhead, and the restriction can apply beyond the immediate sign. For more on how reopening decisions are made, see [Who Decides When a Wyoming Trail Reopens].
Choose a lower route or postpone the trip
When a high-elevation route is still snowed in, look for a different area with routes that are designated for your machine and open to motorized use. Avoid substituting an unmarked forest track, ranch road, or route across private land just because it looks passable. Public access depends on route designation, land ownership, and current restrictions—not simply on whether a machine can travel there.
If no appropriate alternative is available, postponing is the better option. That can feel disappointing when you have already loaded the trailer, arranged time off, or driven toward the mountains. Still, forcing a ride onto a wet or closed route can mean a damaged trail, a stuck machine, or a long recovery far from help. A flexible plan protects both your trip and the place you came to ride.
The Forest Service’s notices and the terrain itself can change quickly during the thaw. Check again close to departure, and be ready to change plans at the trailhead. Riders who adapt are more likely to find a worthwhile outing without turning spring conditions into a problem for themselves, land managers, or the next group on the trail. For a broader look at the season, see [Wyoming Riding in Early Spring].
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.
