18,000 years ago there was no SF Bay Estuary and the delta was in a whole different location. More recently, the last 164 years ago has dramatically changed these formations again. Join Ranger Linda and watch the Bay Model fill. Watch an accelerated time lapse and see how one of the world’s largest natural estuaries and one of the few inverted deltas on the planet were created.
Bay Nature's events calendar has events from nature organizations all over the Bay Area. Find guided Bay Area hiking, learn about Bay Area wildlife, and more. Learn about our In the Field outings. Or submit your own event.