Last December 9, the forecast for Willow River State Park called for measurable snow. The volunteers who groom its ski trails began planning on their public message board. They agreed to roll and track the trails south of the river during the day, since that side was closed to hunting. A second group would pack the Silver and Pink trails and the Red Prairie Loop, which sit in the hunting area, only between 5:30 p.m. and 5:30 a.m. One volunteer took the after-dark shift and asked skiers to stay off those trails until Dec. 16, the day after the state park gun and trapping window closed.
That thread shows how the park County Road A runs into actually works in early winter. Skiers can head out on the first good snow, but where the volunteers groom, and when, follows the hunting calendar. From mid-November through mid-December, hikers, hunters, naturalists and ski groomers share the park, and each one's schedule follows the dates the Wisconsin DNR publishes.
The calendar the park actually runs on
The park is open year-round from 6 a.m. to 11 p.m., and every vehicle needs an admission sticker. After the Willow River conditions page notes the park was closed to all hunting from May 5, the dates below are the ones that matter.
| Date | What happens at or around Willow River |
|---|---|
| Oct. 13, 2026 | Showers, flush toilets, fountains and the dump station closed for the season |
| Nov. 15 | Hunting and trapping open in the park's mapped open areas |
| Nov. 21 to 29 | Statewide nine-day gun deer season |
| Nov. 30 to Dec. 9 | Muzzleloader season |
| Dec. 10 to 13 | December antlerless-only hunt |
| Dec. 15 | Last day of the state park gun and trapping window |
| Through the Sunday nearest Jan. 6 | Archery hunting continues in open areas |
The state park hunting page sets the Nov. 15 to Dec. 15 window that applies across Wisconsin's parks. The DNR's season dates page lists the deer seasons that fall inside it. At Willow River itself, hunting and trapping are allowed only in areas the park maps as open. Trapping is not allowed in closed areas or within 100 yards of designated-use areas, and trails count as designated-use areas. The open and closed zones appear on the park's hunting map, which you can find through the Willow River hunting page.
The water shutoff matters for an ordinary weekend visit too. Vault toilets stay open, and campers can still get water at the service building.
Three of the four remaining November programs fall in gun season
The DNR's Willow River events calendar runs through the end of November. After Fall Crafts on Nov. 8, four programs remain on it:
- Saturday, Nov. 14: Trails Through Time: Exploring Wisconsin's Geology. A 4-mile hike with the park naturalist, held the day before hunting opens.
- Sunday, Nov. 22: The Great Fall Feast Guided Hike. An easy walk on the Trout Brook Trail about how animals prepare for winter.
- Saturday, Nov. 28: Hibernators of Wisconsin Trivia Walk. Pick up a clipboard and trivia sheet at the Nature Center, then walk a half-mile route.
- Sunday, Nov. 29: Winter Bird Feeding. The basics of backyard bird feeding, winter edition.
The last three fall within the Nov. 21 to 29 gun deer season. The naturalist programs keep running through it, and dressing for them is part of planning the outing. In a November 2024 release, the DNR recommended that non-hunters and their pets wear blaze orange or fluorescent pink on public land open to hunting during gun deer season. Hunters themselves must wear at least 50% blaze orange or fluorescent pink above the waist, including headwear, during any firearm deer season. A bright hat on the Trout Brook Trail Nov. 22 fits in with what everyone else in the park is wearing.
The Nature Center hosts the trivia walk. The DNR says its hours vary and generally aim for noon to 4 p.m. daily, so call ahead before making the trip for it.
How the volunteers worked around hunting last December
The ski trails are groomed by volunteers. The DNR's Willow River winter page says volunteers groom and track the cross-country trails on the south side of the river for skate and classic skiing. Last season the volunteer crew coordinated publicly on a groups.io board, and their December 2025 posts show how much the hunting window shapes their work.
On Dec. 5, after about 2 inches of new snow, a groomer reported going "double wide" on the Red, Brown, Purple, Green and Blue trails and parts of Yellow and Orange. He wrote that skating felt like mid-winter conditions even though the base was still too thin for machine tracks. A few days later the crew planned the next snowfall. They set track on only one side of the trail because hikers could still use the trails through Dec. 15, and they held off on signage until deer season closed. In the Dec. 9 planning thread, one volunteer wrote:
"Once deer season closes, we'll put out the sawhorses and 'Skiers Only' signs."
On Dec. 11, after a night shift, the crew reported that the entire north side had been rolled two machines wide. They also covered the nature loop and the ball field practice loop and did some smoothing in the sledding hill area.
Those were last winter's dates. The pattern holds because the rules behind it haven't changed. The state park hunting window still ends Dec. 15, and the park's posted rules still say hikers and snowshoers may not use designated cross-country ski trails once those trails are snow-covered. Archery hunting continues in open areas into early January, but after Dec. 15 the gun and trapping window is over. That's when last season's crew planned to put out the sawhorses and "Skiers Only" signs on the groomed trails.
Where everyone else goes once the snow sticks
The ski rule leaves hikers, snowshoers and dog owners a defined space. The DNR winter page describes 2 miles of hard-packed trails north of the river for snowshoeing, hiking, dog sledding and pets. The page also lists sledding, ice fishing and winter camping. On winter weekends the Nature Center classroom becomes a warming house, open Saturdays and Sundays from 9 a.m. to 4 p.m.
The volunteers check conditions often, but the DNR's statewide ski page points skiers to Travel Wisconsin's Cross-country Ski Report for trail conditions. It also warns that trails may close when snow is poor. In early December, with the base still forming, that report is worth checking before you load the car.
The bike trails come from the same volunteer network
Winter at Willow River also includes fat bikes. In last season's Dec. 4 thread, the groomers reported that a volunteer had taken a snowdog out to groom Perch and Bluegill, the bike trails south of the river.
Volunteers also build those trails. The WIKI Mountain Bike Club is part of the Friends of Willow River & Kinnickinnic State Parks. It says its volunteers develop, build and maintain the bike trails, and that the work is not funded, built or maintained by the DNR. The DNR says about 26 miles of mountain-bike trail are open in a system the Friends are still building over several years. According to the club's FAQ, the approved plan calls for 25 miles of new trail at Willow River and 15 at Kinnickinnic, with trails opening in stages as volunteer hours, donations and state support allow. The 2026 trail plan names Brook Trout, Bass, Buck Snort, Perch, Bluegill and Sunfish among its projects.
In the wet weeks before freeze-up, the club's trail status page is the place to check. In its late-October update, the club asked riders not to ride if they would leave ruts, warned that wet leaves are slippery, and said trails would close after heavy rain in a 24-hour period.
A December detail on the sticker
The admission sticker follows its own calendar. In its September 24 release, the DNR listed 12-month vehicle passes at $28 for Wisconsin residents and $50 for nonresidents, plus a $13 senior pass for Wisconsin residents 65 and older. Additional vehicles registered to the same household cost $15.50 for residents. A 12-month pass normally runs 12 months from the date of purchase. Passes bought during December 2026 carry the 2026 design but are good through Dec. 31, 2027. The new 2027 design goes on sale Jan. 1, 2027. If your current sticker expires around the time the ski trails open, buying the renewal in December covers all of next December too.
You can buy passes online, at the park office, at DNR service centers, when you renew a vehicle registration online, or at DMV self-service kiosks. Hunting areas and trail rules can change on the ground, so check the park's posted maps and staff before heading out.
Part of what makes a Hudson address feel like home is knowing which week Willow River turns from woods walks into groomed corduroy. If you're thinking about what your home near the river is worth, the Platinum Real Estate Team can put together a valuation that reflects the setting around it, not just the square footage. Request your complimentary home valuation, and let's talk before the "Skiers Only" signs go up.
