WHAT TO WEAR--Warm clothing should be worn, and one should be prepared for the sudden changes of temperature common at an altitude of 7,500 feet. Visitors should have medium weight overcoats, jackets, "windbreakers" or sweaters. Stout outing shoes are best suited for walking about the geyser formations and terraces, and for mountain use. Women's ordinary street shoes are not well adapted for these walks. Tinted glasses, serviceable gloves and a pair of field or opera glasses will be found useful.
BAGGAGE--The Yellowstone Park Company-Yellowstone Park Lines, Inc., and the Teton Transportation Company will carry free, two pieces of hand baggage for each person, not exceeding 60 lbs. in total weight. Additional pieces of hand baggage, for complete tour of park--$1.00 each, charged by Yellowstone Park Lines, Inc. and by Teton Transportation Co. There is no arrangement for carrying trunks into the Parks.
CHURCH SERVICES--The chapel in Yellowstone National Park is located at Mammoth Hot Springs. Protestant and Catholic services are held every Sunday in the chapel and at other points in the Park, and are bulletined in hotels.
BATH HOUSES--Natural hot-water bathing pools are maintained at Old Faithful and Mammoth Hot Springs. Suit and towel may be rented at a small charge.
MEDICAL FACILITIES--Physicians and a surgeon of long experience have headquarters at Mammoth Hot Springs and are available for service at any place in the Park. Also at Mammoth Hot Springs is a well-equipped hospital with skilled personnel. Trained nurses are also stationed in each hotel. Rates are the same as prevail in cities near the Park.
SADDLE HORSE TRIPS AND GUIDES--Saddle horses and competent guides are available at the Yellowstone Park hotels and Jackson Lake Lodge at reasonable rates approved by the National Park Service. Horseback trips afford opportunities to get far away from roads and beaten paths into the remoter scenic regions and to see many of the more timid wild animals that inhabit the Park. The Dude Ranches in Jackson Hole offer attractive outings.
[Illustration: Ranger-naturalists present educational evening lectures]
MAIL, TELEGRAPH AND TELEPHONE--The main post office in the Park is Yellowstone Park, Wyo., and is located at Mammoth Hot Springs. Guests stopping at hotels should have their mail addressed to Old Faithful Store, to Canyon Hotel or to Mammoth Hotel, Yellowstone Park, Wyo., depending at which place the addressee will be when the mail is received. Mail for travelers in Teton Park should be addressed care of Jackson Lake Lodge, Moran, Wyo. Telegraph and telephone service between all hotels; telegraph to all parts of the world; telephone connections throughout the United States. Address your message to the hotel where addressee will be. If the person is at some point other than that of receipt, delivery of message entails a forwarding charge. Money transfers at all hotels in the Park.