The Donner Memorial State Park's visitor center has a collection of displays and maps relating to the Donner Party and cross-country ski and snowshoe trails.
The Donner Memorial State Park cross-country ski trail begins immediately behind the parking entrance kiosk, located 100 yards west of the visitor center.
Unless there was a recent storm that brought a lot of fresh snow, the parking area and trailhead at the top of Glacier Way is easy to spot. Overflow parking is available at the end of Glacier Way in the cul-de-sac.
The trail to Castle Peak climbs gradually to Castle Pass (7,880 ft). A waypoint on the Pacific Crest Trail, Castle Pass is also the junction for the Sierra Club's Peter Grubb Hut, located in Round Valley.