Norovirus is a highly contagious virus that causes acute gastrointestinal illness and has recently affected hikers and bikers along certain sections of the Arizona National Scenic Trail (AZT), particularly around Kearny, Superior and Roosevelt. This advisory is intended to help trail users understand the risk and take proper precautions.

What is Norovirus?

Norovirus spreads easily through contaminated food, water, surfaces, or person-to-person contact. Symptoms typically include:

• Nausea
• Vomiting
• Diarrhea
• Stomach cramps

Symptoms often appear 12–48 hours after exposure and can be intense but typically resolve within a few days.

Preventive Measures for Trail Users

• Wash Hands with Soap and Water — alcohol-based hand sanitizers are not effective against norovirus. Use soap and water, especially after using the bathroom and before eating.
• Practice Safe Food Handling
• Cook food thoroughly. Avoid sharing utensils, water bottles, or food with others.
• Maintain sanitation in the Backcountry
• Dig catholes 6–8 inches deep and at least 200 feet from water sources, campsites, and trails. Pack out trash and used toilet paper if possible.
• Treat Drinking Water Properly — boil water or use chemical disinfectants. Standard filters may not remove norovirus.

If You Get Sick

• Isolate yourself from other trail users to reduce the spread.
• Stay hydrated with electrolyte-replacing fluids.
• Rest until you fully recover.
• Clean and disinfect contaminated surfaces and wash soiled clothing.
• Stay informed and practice good hygiene to help keep yourself and fellow trail users safe.