What is the best summary of the following passage?
The Elk River flows from the far northern part of the state all the way to the southern tip. All kinds of animals rely on it for drinking water, people eat the fish they catch in it, and farmers in the state depend on it for irrigating their crops. Since there is very little rain in this state, the Elk River gives animals and humans the water they need to stay alive. Even though the river is not nearly the biggest in the nation, it is very important to the people and animals that live near it.