Hahamongna is the rare spot in the Arroyo Seco at the foot of the San Gabriel Mountains where the mountainous watershed meets the urban plain. Periodically floods roar into this basin. Bounded on the north by the mountains and Jet Propulsion Laboratory and on the south by Devil's Gate Dam, Hahamongna contains five unique habitat zones that only exist in alluvial canyons near the mountains. Most sites like this in Southern California have been destroyed.

Don't let Hahamongna go the way of other lost environmental treasures in Southern California.


The Meaning of Hahamongna

The original settlers of the region were sometimes called the Hahamongna Indians. The word means "Flowing Waters, Fruitful Valley" in the native Tongva language.

Donors to the Save Hahamongna Fund Will Receive a Complimentary Tshirt

Please Give Generously to Save Hahamongna

Save Hahamongna is an educational campaign of the Arroyo Seco Foundation and other organizations working to preserve the natural character of our region's most special place.

Your contribution will go directly to the Save Hahamongna Fund.

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