The watershed of a river, stream or creek is the land area that collects all of the rainfall that drains into that body of water. Mountain ridges, called divides, separate watersheds. When it rains, all the water runs down one side of the divide in to one creek or down the other side into another creek. Imagine several bathtubs lined up next to each other. Turn the water on along the edge of two tubs. Water will always run in to one or the other. Everywhere you go on the land, you will be in a watershed.

To learn more about the natural history, water flow, plants, wildlife and land use in each of the zones of the Arroyo Burro watershed and in some marine habitats, click on a zone on the map. A new window will open.

Zones
Mountains
Foothills
Coastal plain and canyon
Estuary
Sandy beach
Kelp forest
Coastal ocean