First need to visit the visitor center to get information about this place before visiting this place. Or visit online national park website.
Road from Chitina to McCarthy is 2.5 hrs drive (one way) on unpaved road. Then you need to take shuttle to go to Kennecott where the trail actually starts. The shuttle runs only up to 7pm (if I’m not wrong). Or you can hike from McCarthy itself with additional miles. Not sure about accessibility during winter.
Lots of mosquitoes and very limited facilities. Prepare with repellents, enough food and water.