Storms can arise quickly. If there's lightning, take cover.
Watch where you walk - lava is sharp, brittle, and unstable; cinders can be slippery underfoot. On either surface, a fall is an unpleasant experience.
This is dry country. Carry water with you and in your vehicle.
Speed limits are reduced for the protection of pedestrians and wildlife. Please watch for both.
Did You Know?
The Sunset Crater penstemon (Penstemon clutei) is found only on cinder deposits within the San Francisco Volcanic Field, including Sunset Crater Volcano National Monument, in northern Arizona.