From the Hike Safe website:

Wherever you hike, no matter what season or whether it’s a short hike or a multi-day trek,be safe:

Follow the Hiker Responsibility Code.

You are responsible for yourself, so be prepared:

1. 1. With knowledge and gear. Become self reliant by learning about the terrain, conditions, local weather and your equipment before you start.
   2. To leave your plans. Tell someone where you are going, the trails you are hiking, when you will return and your emergency plans.
   3. To stay together. When you start as a group, hike as a group, end as a group. Pace your hike to the slowest person.
   4. To turn back. Weather changes quickly in the mountains. Fatigue and unexpected conditions can also affect your hike. Know your limitations and when to postpone your hike. The mountains will be there another day.
   5. For emergencies. Even if you are headed out for just an hour, an injury, severe weather or a wrong turn could become life threatening. Don’t assume you will be rescued; know how to rescue yourself.
   6. To share the hiker code with others.