Historic Resource Study, Crater Lake National Park, Oregon, 1984
IX. Trails and Campgrounds of Crater Lake National Park
E. Summary of Park Trail System
2. Northwest Section of Park
a) Red Cone: 7,372 feet, easy climb from North Entrance road.
b) Boundary Springs: on park boundary line, source of Rogue River. Reached by following Castle Creek and Bald Crater motorways for seven miles from North Entrance road at a point four miles below the rim drive. Springs also reached by shorter trip from Diamond Lake highway.