From the parking area, follow the main campground road to the left and access the North Klondike River from one of the riverside camping sites. Ensure that you assess ice conditions carefully, though by late winter/early spring there should be more than sufficient ice thickness to support snowmobiles and skiers.
The first one and half kilometers follows closely on and along the river heading northwest, until you reach a more wide-open-braided section of the river valley, which is covered in aufeis or overflow ice in the winter, essentially a large sheet-like mass of layered ice. Keep to the left as you traverse across the open ice sheet, avoiding any wet looking areas where water is seeping through. The going here is quite easy as the surface is flat and smooth for the next 1.5 km.
After the overflow ice section the river becomes one main channel again and the route essentially follows along the river to Divide Lake which lies to the southwest. For the first half of the route, the trail seems to follow along the right side (north side) of the river, but then does cross over to the left side (south side) towards the later half of the route. The elevation gain is very gradual along the route with a few ups and downs, but the trail stays mostly in the river valley. As for avalanche exposure, the route stays within simple avalanche terrain
along the valley. If you've timed your trip right there should be a main snowmobile trail through the valley that you can follow. If you are not on a packed trail your progress will be a lot slower as the snowpack is not very supportive in such a dry and cold climate. The snow becomes very granulated (like white sugar), and it's common to sink up to your waist in snow.
There are suitable camping spots all along the length of the valley as well as at Divide Lake if you can make it there in a long day (17.4 km ~ 8.5 hours). The scenery in the area is stunning, particularly the steep granite cliffs that tower above the lake. From Divide Lake, as in the summer, you can also continue to Talus Lake
(another 10 km, return) for a nice side trip for views of the iconic Tombstone Mountain and Mount Monolith. The snow is also better in this area for alpine touring with many possible ski slopes.