Start at the Selkirk Lodge (walk up the groomer trail from the lower lot if you parked there). Walk down the hill to the start of the Linder Ridge Nordic ski trail. You'll see a State Parks sign to your left, marking the start of the Trail 260 snow shoe trail (winter use only).
The trail goes downhill steeply for a few feet, and then you'll start to see a line of blue diamonds and pink trail marking tape on trees, roughly parallel to the Linder Ridge Nordic trail and angling down the hill below it. After a few minutes of side-hilling, you'll come to some easier terrain that follows an old road. Continue to follow the markers until they die out, where if you look left and right, you'll see you're on another old road, known as "Condo Road".
Once you reach Condo Road, you can go either direction for some distance. When you've had enough, return to where you started and climb back up the hill to the lodge.