Boil and filter untreated water before using, or carry water from a treated water source. Pets Pets are permitted on hiking trails but must be on a leash at all times. Dogs and other pets may jeopardize your safety and theirs by provoking and attracting wildlife. Weather Snow and very cold temperatures can occur any month of the year. Very strong winds are common and will quickly cause hypothermia.
Sunburn can be a major problem, particularly at higher elevations.
Because mountain weather can change very rapidly and unpredictably, you should carry sun screen, appropriate clothing and proper equipment at all times. Information last updated July 31, 2000.