When you pick up your permit, check on areas that may be closed to backcountry use. No overnight camping is permitted at Lake Solitude, Bradley Lake, Taggart Lake, Laurel Lake, Amphitheater Lake, below the Forks of Cascade Canyon to Jenny Lake, and the lower valley area east of the Valley Trail and the east shore of Jackson Lake. No overnight camping is permitted along the Snake River. Water Warning. Surface water is of questionable purity. Carry water from approved public supplies. Backcountry water should be boiled for one minute, three to five minutes at higher altitudes. Water treatment disinfection chemicals are not considered as reliable as boiling to safeguard against _Giardia_ and _Campylobacter_ intestinal disorders. Most water filter mechanisms are not adequate for these organisms. The evening meal is an ideal time to boil water for drinking and brushing teeth and for the next day’s use. Bear Warning. Black bears are sometimes seen in the backcountry and in campgrounds. They show little fear of people and may try to get your food. Federal law requires proper food storage in the backcountry and in campgrounds. Suspend food from a tree (or bear pole if provided) or store it out of sight in a vehicle. Your backcountry permit packet includes instructions on hanging your food. A bear brochure is available free at ranger stations and visitor centers. Make sure everyone in your party reads this information before your trip. Report all bear sightings, damage, or injury to a park ranger. Grizzly bears are seen occasionally in northern parts of the park. If a bear should charge you, climb a tree or play dead. Don’t try to run away, however. Running excites the bear, and you cannot outrun one. Theft from Parked Cars. Trailhead parking areas are patrolled regularly, but in recent years theft from cars parked overnight has become more common. Leave nothing of value visible in your car and thoroughly lock up the vehicle before leaving on your hike. It’s best to lock valuables in your trunk. Trip Planning. Write the Grand Teton Natural History Association at the park address for a list of sales literature and maps to enhance your pre-trip planning and enjoyment. Horseback Riding.