The site was constructed and is maintained by volunteers from the Rim of the World Interpretive Association. A donation is requested for those keeping the Arboretum trail guide. An Adventure Pass is required if you plan to go hiking, camping or picnicking in the National Forest. They are available at Lake Arrowhead Visitor Center in Rim Forest on Highway 18 or all Ranger Stations. The trail is specifically designed and maintained to accommodate the needs of the visually and physically disabled.
All interpretive signs are in distinctive print and braille.
An Adventure Pass is required if you plan to go hiking, camping or picnicking in the National Forest. They are available at Lake Arrowhead Visitor Center in Rim Forest on Highway 18 or all Ranger Stations. The trail leads to bedrock mortars used by the Serrano Indians to grind acorns and to make flour. The Serrano came to this area each spring because of the plentiful acorn crop and the mild weather. Bedrock mortars were formed by the grinding action of mono and pestel stones.