12. Reduced engine power–Gasoline, etc.–Due to the high altitude of the park roads, ranging between 4,000 and 7,000 feet, the power of all automobiles is much reduced, so that about 50 per cent more gasoline will be required than for the same distance at lower altitudes. Likewise one lower gear will generally have to be used on grades than would have to be used in other places. A further effect that must be watched is the heating of the engine on long grades, which may become serious unless care is used. Gasoline can be purchased at regular supply stations as per posted notices .
13. Penalties–Violation of any of the foregoing regulations for government of the park will cause revocation of automobile permit, will subject the owner of the automobile to immediate ejectment from the park, and be cause for refusal to issue new automobile permit to the owner without prior sanction in writing from the Secretary of the Interior.
14. Damages–The owners of automobiles will be responsible for any damages caused by accident or otherwise.
15. All persons passing through the park with automobiles are required to stop at the supervisor’s headquarters or the rangers headquarters and register their names.
16. Motorcycles–These regulations are also applicable to motorcycles, which may use the roads on payment of a fee of $1 for each machine per annum; permits issued therefor shall expire on December 31 of the year of issue.
U.S. Department of the Interior, The Crater Lake National Park, Season of 1916 (Washington, 1916), pp. 17-19.