A 35-year-old visitor from Massachusetts was seriously injured by a bear on May 19 in the area of the Signal Mountain Summit Road in Grand Teton National Park.

Park rangers and Teton County Search and Rescue personnel responded to the scene to provide emergency medical care and air lifted the patient via helicopter to a waiting ambulance where he was transported to St. John’s Hospital in Jackson.

The patient is in stable condition and is expected to fully recover, a park official reported Thursday.

Based on initial reports from the injured visitor and preliminary information conducted as part of an ongoing investigation of the site, law enforcement rangers and park biologists believe the incident was a surprise encounter with two grizzly bears, with one of the bears contacting and injuring the visitor.

The park temporarily closed Signal Mountain Summit Road and Signal Mountain Trail to all public entry.

Park officials advise to prevent human-bear conflicts, visitors are reminded to never leave your food unattended unless it is properly secured, keep a clean camp and adhere to all food storage orders and store all attractants, including coolers, cooking gear, pet food, and toiletries, inside a bear-resistant food locker or a hard-sided vehicle with the windows rolled up, properly store garbage until you can deposit it into a bear-resistant dumpster, do not eat or cook in your tent, and never keep food or other scented items in your tent, respect all wildlife closure areas, and if you see a bear, please give it space. Always stay at least 100 yards away.