Bridger-Teton National Forest: Greys River ATV & Moto Tracks

First Tracks: The Land & The Layout

The Bridger-Teton National Forest does not care about your ego. This is a massive, sprawling footprint of western mountain timber and jagged alpine basins. You are riding directly into the Salt River Range, operating entirely off the grid. The trail systems here are built for riders who understand backcountry survival and respect the sheer scale of the landscape. It is not a place for reckless throttle dumps or shiny showroom builds that have never seen a rock strike.

Management of this territory falls to the Greys River Ranger District. They patrol a staggering amount of acreage, ensuring the delicate high-altitude ecosystems remain intact. Riders come out here to escape the crowded, fenced-in commercial parks. You trade the noise of the city for shaded, old-growth tree canopies that eventually break wide open into faint meadow tracks.

Do not expect bottomless mud bogs or manicured jump lines. The ground here is a brutal mix of shattered rock, heavy forest loam, and steep climbing grades. The elevation starts at 6,400 feet and relentlessly pushes past the 8,000-foot mark. Your engine will breathe hard, and your clutch belt will feel the heat soak of sustained climbing.

Because this is a sprawling piece of public land, you are sharing the dirt. You will cross paths with hikers, hunters, and pack horses carrying gear into the deep timber. Volunteer trail crews and local riders are the only reason these tracks stay passable. You are expected to treat the land with heavy respect, leave absolutely no trace, and understand that out here, you are your own primary rescue plan.

The Dirt: Trail Networks & Ground Truth

• The Mountain Soil: The base layer of these tracks is roughly eighty percent hard-pack dirt and thick forest loam. The remaining twenty percent consists of loose rock bands and massive tree roots that will test your suspension geometry. Mud is not a major factor unless you are riding in early July when the snowpack is melting off. During that narrow window, snowmelt funnels directly down the tracks, creating slick, permanent trenches that will swallow a front tire. You have to read the dirt constantly because traction flips from sticky loam to loose, rolling stones in a matter of seconds.

• The Squaw Creek Climb: Locals refer to the main technical section as the Squaw Creek loop or TR 3184. It forces a brutal 1,525-foot elevation gain over a very short 2.8-mile stretch. The average climbing grade hovers around nine percent, meaning your rig needs serious low-end torque to keep moving forward without burning up a belt. When you point the nose downhill, you must rely on engine braking to survive. If you ride your brake pedal the whole way down, you will boil your brake fluid and find yourself heading toward the tree line with zero stopping power.

• The Fifty-Inch Gatekeepers: The forest service relies on a strict fifty-inch maximum width limit for this trail system. Steel entrance posts are planted firmly in the ground to physically block wide-stance rigs from gaining access. Do not try to squeeze a wider side-by-side through the gates. You will just shatter your plastics and bend your A-arms against cold, unforgiving steel. This rule means the tracks belong exclusively to dirt bikes, standard ATVs, and narrow trail-width machines.

• Yielding to the Herd: This is multi-use public land, and you are at the bottom of the right-of-way food chain. If you encounter riders on horseback, western backcountry etiquette takes over immediately. You must pull your machine over to the downhill side of the trail and kill the engine. Take your helmet off and wait silently until the animals pass completely. Spooking a pack mule on a narrow shelf road usually ends in a fatal fall, and the local community will not forgive you for it.

• High Altitude Attrition: The weather at 8,000 feet does whatever it wants, regardless of the forecast down in the valley. A clear blue sky can turn into a violent, temperature-dropping squall faster than a cheap socket strips a bolt. The trail gets chewed up heavily by migrating big game, leaving deep, hidden holes in the tall alpine grass. You must keep your eyes scanning far ahead of your front bumper. If you overdrive your line of sight, the mountain will quickly introduce your skid plate to a buried granite boulder.

Basecamp: Trailheads, Staging & Survival

• The Greys River Bridge Staging Hole: The primary unload zone is the Murphy-Squaw Motorized Trailhead, located exactly at coordinates 43.142856, -110.933396. It sits just off Greys River Road, about four and a half miles east of the highway. There is a small, tight turnaround at the seasonal gate on Squaw Creek Road. Keep massive, forty-foot toy haulers far away from this specific bottleneck. If you wedge a massive tow rig up there, getting it out requires backing down a narrow dirt grade, which is a miserable way to start a weekend.

• Murphy Creek Campground: If you want to sleep on the dirt, this primitive campground sits fourteen miles up from Alpine on the main graded road. It offers ten rustic campsites situated right on the banks of the river. Sites operate strictly on a first-come, first-served basis, costing between seven and twenty dollars a night depending on current fee hikes. You pay with cash in an old-school fee tube. There are no RV hookups, no electricity, and no dump stations, but the lot can accommodate trailers up to thirty feet.

• Deer Creek Guard Station: Located a mile away from the primitive camp is a historic, reservable forest service cabin. It sleeps eight people on bunkbeds and provides a heavy roof over your head for sixty bucks a night. You have to book it online through the federal recreation portal well in advance. The cabin features an indoor bathroom, but the water pump frequently fails during the summer. You must pack in your own drinking water, and septic rules forbid you from parking extra RVs outside the cabin.

• The Bear Country Reality: You are staging your rig deep inside the Greater Yellowstone Ecosystem. Grizzlies and black bears actively patrol this drainage looking for food. Keep a can of bear spray strapped directly to your chest rig or mounted securely to your roll cage. Burying it at the bottom of a zippered backpack makes it completely useless in an ambush. Store all your food and trash inside hard-sided vehicles or certified bear boxes at the campground.

• The Town of Alpine: Alpine, Wyoming is your final outpost for civilization before you cross into the timber. It sits about fourteen miles away from the primitive camps. You will find Lincoln County Customs right at the entrance to the corridor for spare parts, belts, and riding gear. Top off your fuel tanks at the Phillips 66 or the Alpine Standard right in town. Once you cross the bridge into the national forest, you are completely cut off from supply lines.

The Red Tape: Permits, Tags, and Fines

• The Wyoming ORV Sticker: Access to these trails requires a valid Wyoming Off-Road Vehicle permit physically stuck to your machine. The decal costs a flat fifteen dollars for the calendar year, and there are no daily passes. Wyoming does not recognize reciprocity with other states. It does not matter if your rig is street-legal and fully plated in Idaho or Utah; you still have to buy the Wyoming sticker to ride the fifty-inch tracks.

• The Hard Seasonal Lockout: The forest district enforces a brutal seasonal closure to protect the high-altitude tundra and local wildlife. The motorized trail network legally opens to the public on July 1 and slams shut early on September 10. Riding past the gate before the dirt is dry rips deep, permanent trenches into the soil that cause massive erosion. The closure also gives the local elk herds room to calve and migrate without the stress of engine noise.

• Cross-Country Travel Bans: Your tires must stay on the designated, visible trail tread at all times. Cross-country travel through the meadows or the brush is a serious federal offense. When massive pine trees fall across the trail early in the season, you are expected to winch them, cut them with a chainsaw, or slowly crawl over them. Bypassing an obstacle by driving over the fragile grass to create a new trail will earn you a massive fine from the rangers.

• Leave No Trace Protocol: This is a strict pack-it-in, pack-it-out environment. There are no dumpsters at the trailheads and no maids coming to clean up your campsite. If you blow a belt on the trail, you carry the shredded rubber out in your cargo box. Dogs are allowed in the forest, but you must pack out all pet waste immediately. In developed camps, dogs must be on a short leash, and on the trail, they must be under flawless voice control so they do not chase the wildlife.

• Street Legal Limits: If your machine is fully street-legal with a license plate, horn, and mirrors, you can ride the main graded Greys River Road earlier in the season before the narrow trails open. However, operating a plated vehicle on the main connecting forest service roads requires a valid driver's license. Unlicensed kids cannot blast down the main graded road just because the machine has a license plate on the back.

The Technicals: Specs, Closures & Self-Recovery

• The Decibel Law: Your machine must run a U.S. Forest Service-approved spark arrester. There are no exceptions, as a single rogue spark can burn down a million acres of timber. Exhaust noise is strictly capped at 96 decibels under the standard half-meter test. Rangers actively patrol the area and will not hesitate to test a blown-out exhaust pipe. If your rig sounds like a rotary cannon firing at idle, leave it on the trailer.

• The Blackout Zone: Cell service drops to absolute zero the second you leave the highway in Alpine. You will have zero bars at the trailhead, zero bars at the cabin, and zero bars on the peaks. You must carry a satellite communicator like a Garmin inReach or a Zoleo device. Without satellite comms, a medical emergency means someone has to drive fourteen miles back to town over dirt roads just to dial for an ambulance.

• Backcountry Extraction: The forest service provides absolutely zero recovery support. There are no dozers, no winches, and no park staff coming to drag your broken machine off the mountain. You must carry your own snatch blocks, heavy-duty tow straps, and tools. If you shatter a suspension component and cannot fix it, commercial off-road recovery outfits out of Jackson will charge you over two hundred and fifty dollars an hour just to drive out and hook up to your frame.

• Helmet Laws and Safety: Wyoming state law requires any operator or passenger under the age of eighteen to wear a properly fitted, DOT-approved helmet. While adults are legally allowed to ride without a lid, it is a foolish gamble on this rocky, unforgiving terrain. Eye protection is highly recommended to block the heavy dust on the connecting roads and the low-hanging pine branches on the single track.

• Unforgiving Rockfall Zones: The official avalanche hazard maps for this drainage highlight several areas where the trail cuts directly beneath massive, unstable hillsides. Heavy spring rains and shifting temperatures make these steep gullies incredibly prone to random rockfall. You have to keep your head on a swivel when passing through the narrow cuts. The mountain is constantly moving, and gravity always wins the argument against a plastic roof.

The Final Throttle: Out on the Grid

Climbing out of the heavy timber into the sweeping Salt River Range changes your entire perspective. You leave the dense, root-heavy shadows behind and break into faint, high-altitude meadows. It is just you, the mechanical rhythm of your engine, and a sprawling horizon of jagged rock. The air gets thin, the temperature drops, and the trail demands your absolute focus.

There are no cheering crowds out here. There are no vendor tents selling overpriced food. It is a quiet, harsh environment that punishes riders who come unprepared. You are trading convenience for the raw, unfiltered reality of western backcountry travel. Panoramic views of Stewart Peak dominate the skyline, rewarding the riders who pushed their machines up the grueling nine-percent grades.

You have to trust your equipment and your own wrenching skills. A loose bolt or a fraying winch cable becomes a massive liability when you are ten miles away from the nearest gravel road. The Murphy-Squaw tracks offer a brilliant, rugged challenge, but the land requires total respect.

Pack heavy, ride smart, and leave the mountain exactly as you found it. The dirt was here long before your machine rolled off the assembly line, and it will be here long after your engine blocks crack. Keep your momentum steady, watch the tree line, and respect the sheer scale of the Bridger-Teton wilderness.

THE SPECS