Historic Resource Study, Crater Lake National Park, Oregon, 1984
VIII. Roads of Crater Lake National Park
B. Entrance Road and Bridges
“Motorways” was the term given to the one-way, low standard truck trails constructed within the park primarily for fire protection. Emergency Conservation Work crews during 1933 accomplished construction of thirty-two miles of new trail and maintenance work on eighty-two miles of old motorways. Truck trails constructed during the 1933-34 seasons were those at Sun Creek, Crater Peak, Wineglass, Timber Cone Crater, and Bear Creek; the Union Peak Loop; and trails between Lost Creek Ranger Station and Vidae Creek Falls and between Castle Creek and The Watchman.