Watershed Info

An animation of the water cycle from NASA.
Hydrology
The Russian River drains an area of 1,485 square miles that is approximately 100 miles long and from 12 to 32 miles wide. From its source, about 16 miles north of Ukiah, the river flows southward for 90 miles through Redwood, Ukiah, Hopland, and Alexander Valleys, and through the northwestern part of the Santa Rosa Plains.Read more…
Geology
The Russian River is predominantly underlain by the Franciscan formation, a mélange of Jurassic-Cretaceous age, formed at the bottom of the Pacific Ocean over 100 million years ago. Read more…
Natural History
The Russian River watershed provides food and shelter for many species of invertebrates, reptiles, amphibians, mammals and birds. Wildlife communities in the watershed are an important part of the ecosystem and its health. Read more…