Persons inexperienced in mountain climbing are requested to obtain the services of a mountain-climbing guide, or attempt climbs only when accompanied by experienced climbers. Since 1931, authorized non-Government guide service has been available in the park. In view of the difficulties one encounters on the Teton peaks and the hazards they present, all prospective climbers are urged to make use of the guide service. If venturing out unguided, climbers should consult rangers or guides for full information relating to routes and equipment. Failure to heed this caution has led to accidents and even fatalities. Climbing parties are required, under all circumstances, to report at either park headquarters or Jenny Lake Museum before and after each expedition, whether guided or unguided. CLIMBING ALONE, WITHOUT A COMPANION, IS NOT PERMITTED.

The climbing season varies with the weather and the amount of snow in the range; it is at its best during July, August, and early September. In most cases it is advisable to allow 2 days for an ascent of Grand Teton, Mount Moran, or Mount Owen and 1 day for other major peaks. Jenny Lake Campground is the logical outfitting point for most expeditions. The majority of ascents require ice axes, rope, and hobbed boots or climbing shoes. Guided parties may arrange to rent equipment from the guide.