According to the city of Woodbury's website:
The Tamarack Nature Preserve has two miles of trails over nearly flat topography, which winds through the Tamarack swamp area offering the solitude and scenery of the Tamarack swamp. During the winter months, the trail is groomed for classical style skiing only. It is suitable for beginners but provides a satisfying experience for all levels of skiers. The trail head is located at the parking lot at 1825 Tower Drive. There are no shelter or restroom facilities available.