For a map or complete description to the Big Hemlock Trail order Porcupine Mountains Wilderness State Park: A Backcountry Guide for Hikers, Backpackers, Campers &Winter Visitors by Jim DuFresne from the eshop:

Most skiers begin this outing with the Nonesuch and River Trail to the groomed Union Spring Trail. Just past Crosscut Shelter the Union Spring Trail swings north (right) for 0.3-mile climb to reach the posted junction with Double Trail spur from the West Vista at Mile 4.8. Continue west (left) here on Big Hemlock Trail with a spirited downhill run. Another long climb follows, topping off in a stand of towering pines, many of them old growth hemlock. The trees are beautiful but keep in mind their thick canopies often result in trails with thin snow cover early in the season.

Big Hemlock Trail remains in the pines for another stretch of scenic skiing until you reach its junction with Government Peak Trail at Mile 6.4, just south of Overlook Trail. Head north (right) and in a half mile you will climb through the hardwoods and pass the second junction with Overlook Trail. Just beyond the junction with the Escarpment Trail there’s a wicked run downhill. Be careful as you could end up flying onto M-107, which at this time of year becomes a popular snowmobiler’s route to the Lake of the Clouds.

The final 2.2 miles begins by following M-107 for a half mile before dipping into the woods to follow a trail above the road. You’re now skiing the access road that served the Carp Lake Mine in the mid-1800s. At Mile 8.5 you pass the first junction to the Deer Yard Trail and then in less than a mile begin a gentle downhill run to the Chalet, ending up at the beginner’s slope.