Where the Plow Stops: How Centennial's Winter Splits Between Green Rock and Ehlin Road

In winter, the state's regular plowing on Highway 130 west of Centennial ends at Green Rock. Above that point, a 179-member snowmobile club, a grooming contractor, a volunteer ski patrol and whoever stops to carry in an armful of firewood decide whether the high country is usable. In January 2026, that small crew was dealing with a trailhead road that drifted in while a webcam showed the parking lot dry, a shelter that had nearly run out of wood, and a safety station with one broken antenna. As of October 10 the Wyoming Department of Transportation shows the highway dry from Centennial to Green Rock. The gaps that came out last winter are the best guide to the one coming.

The State's Line Is the Green Rock Lot

The Green Rock Trailhead sits where winter Highway 130 ends. The Laramie Boomerang's cross-country ski guide describes the lot as plowed and open only to nonmotorized users. An older Boomerang backcountry guide puts the end of winter plowing from Centennial just before the Green Rock picnic area.

For a while, some plowing went past that line, but it stopped being regular last season. The Snowy Range Snowmobile Club's January 15, 2026 meeting minutes warned members:

"the normal plowing above the State's winter maintenance end point at Green Rock has ceased. If you park above the skier lot, beware it could blow in while you ride and may not be cleared for some time."

The minutes add that the area was "getting cleared but not with the same regularity." So the reliably plowed parking up high is the skier lot, and it is reserved for skiers and snowshoers. Snowmobiles get their own starting point back toward town.

Ehlin Road Depends on a Contract and a Camera

The motorized side starts at the Ehlin Road trailhead outside Centennial. Wyoming State Parks says the Snowy Range snowmobile trail system is maintained jointly by the Wyoming State Trails Program, the U.S. Forest Service and local snowmobile clubs. The posted season runs December 15 through March 15, weather permitting, and the current map is labeled "2026 Snowmobile - GeoPDF."

Ehlin Road gained capacity last winter. In the January minutes, the club reported that the grooming contract holder had "added a cat based out of the Ehlin Road trailhead outside Centennial." The same minutes called the trails "really solid and well groomed."

They also explained why the trailhead had been hard to get into. The club followed up with State Trails about the plowing contractor, who had been checking a webcam that showed a dry parking lot. The camera didn't show that the road through the trees was "blowing/drifting and needed plowed." Wind loads the Snowies unevenly, and a single camera aimed at the lot missed the stretch that mattered. The minutes don't say whether that monitoring has changed for 2026-27.

Riders on the groomed trails also need a Wyoming user-fee decal. State Parks requires a current resident or nonresident decal displayed on the outside of the machine and sells them online through the Wyoming Trails portal and at in-person selling agents. As of today the permit page still lists 2025-26 permits, so this season's sale details aren't posted yet.

What the Club Keeps Running

The Snowy Range Snowmobile Club does much of the upkeep that keeps the motorized side safe. Its January secretary report counted 179 members: 13 premium business memberships, 12 associate business memberships, 70 families and 84 individuals. The secretary called it "far and away our biggest season." The treasurer reported $18,783.52 in the club's checking account.

Here's what that money and volunteer time covered as of mid-January:

1. Beacon-check signs at four points, all reported in place and working: Albany, Green Rock, Chains End and Lake Marie. The Green Rock station's third antenna was broken. It still worked but was flagged for repair in the off-season.
2. Safety shelters, all reported "in place with plenty of wood." Two members restocked the Quealy shelter on January 4, when it was "nearly empty of wood inside." The club asks visitors to pack out trash and to "bring an armful of wood in if you stop by."
3. Trail monitoring, including a report that a truck stuck above Albany had been removed with no lasting trail damage.
4. Rescue planning. After a snowmobile crash near Cody where equipment cached in a nearby shelter helped rescuers, the club discussed caching rescue gear in its own shelters with Albany County Search and Rescue. The minutes note that several club members are involved in SAR.

The minutes don't say whether the Green Rock antenna was repaired over the summer. Whether a shelter has wood in February still depends on the last person who stopped there.

The Skier Side Gets Less Grooming

Past the Green Rock lot, nonmotorized routes get far less machine work than the snowmobile trails. The Boomerang guide describes most Snowy Range routes as user-packed rather than regularly groomed. From Green Rock, the Libby Creek Trail drops down a steep segment, branches west, and climbs Libby Creek Canyon for 3.8 miles before continuing off-trail toward Libby Flats.

Barber Lake Road works best as a one-way downhill run with a shuttle. A Centennial skier quoted in that Boomerang guide described leaving cars at Corner Mountain, starting at Green Rock, and covering about 5 miles in a couple of hours. He called parking at the bottom of Barber Lake Road "very dubious."

Sources disagree on how these routes are maintained. Visit Laramie describes Libby Creek as a six-mile loop and Barber Lake as a 4.5-mile downhill groomed for classic skiing only. An older Boomerang account says the Libby Creek loop wasn't groomed and could only be packed down by ski and snowshoe traffic. Nothing published for this season settles it, so it makes sense to plan as if the trail is packed only by whoever went before you.

Closer to town, two lower systems are the early- and late-season options. The Boomerang guide lists about 8 miles of Little Laramie trails on both sides of Sand Lake Road, with easier routes near the North Fork of the Little Laramie River, and about 5 miles at Corner Mountain in two main loops with cutoffs and big rollers that connect toward Barber Lake. The older account warns that lower-elevation skiing may be limited until midwinter. It describes a roughly 4.5-mile North Fork route up the drainage to Brooklyn Lake Road that the Forest Service didn't groom and that saw little use.

The Medicine Bow Nordic Association, the best-known grooming group in the area, lists the Happy Jack area east of Laramie as its responsibility, not the Centennial corridor.

Open Items Carried Into This Winter

Last season ended with several unresolved projects that connect the two trailheads.

A second beacon station at Green Rock. The club's January minutes describe a proposed beacon-check station at the Green Rock nonmotorized access point, used mainly to reach Libby Creek backcountry ski terrain. Wyoming Trail Alliance voted to donate $500, restricted to that project. The Medicine Bow Nordic Ski Patrol asked to partner on it and sent a representative to the meeting to discuss details. The cost was still unknown and the permitting still had to be worked out, and Albany County Recreation Board grants came up as a possible funding source. No later public record says whether the station was funded, permitted or built. If it is, snowmobile and ski groups will be sharing safety equipment at the lot where their winters divide.

The patrol's own pipeline. The Medicine Bow Nordic Ski Patrol describes its work as backcountry assistance in the Medicine Bow National Forest. Its bylaws cover first aid, ski-safety education, training, and search and rescue in coordination with the Forest Service and the Albany County Sheriff's Department. This fall it advertised an Outdoor Emergency Care class for new patrollers, with information meetings on August 12 and August 27.

Sand Lake Road. In January the road was closed to riding during a logging operation off Fallen Pines, and the club asked riders to give the logging trucks room. The Little Laramie ski trails sit on both sides of that same road. No update on it has been published since.

Shared snow reports. Wyoming Trail Alliance proposed a monthly social-media video of someone digging a snow pit. Club members backed the idea and offered to film the pits they already dig as part of their guiding work. The minutes describe it as a possible joint project with the Medicine Bow Nordic Ski Patrol. The same minutes described ice layers in last winter's snowpack and advised traveling with caution in avalanche terrain, especially after new snow.

The club's January minutes are the latest public record on all four items. The first meeting of the 2026-27 season should answer them.

If you own a cabin or a place in town near the Green Rock or Ehlin Road side of the highway and want to talk through what winter access means for your property, Kelly Cooksey is glad to share what she knows about the Snowy Range corridor. Let's Connect.

This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.