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Who We Are

The Arroyo Seco Foundation was founded a century ago with the mission of protecting the Arroyo Seco, the canyon and stream that runs south from the San Gabriel Mountains.  Today, we advocate to preserve the region's watershed and to protect and restore the native flora and fauna.

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We work in the Arroyo Seco to restore the natural habitat, monitor the population of rainbow trout, and advocate for habitat protections that will allow trout to once again flourish in the Arroyo. We also operate a native plant nursery in the Hahamongna Watershed Park, which is located within the Arroyo Seco

What We Do

Hahamongna Native Plant Nursery

Read about our work in the 
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Trout Scouting information coming soon!
Hahamongna Native Plant Nursery

Events

featured our work
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Watershed Projects

Click below to download
reports related to our
Streamflow Enhancement Program

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Click below to download
our quarterly newsletter

Arroyo Currents

Show your love for two great local institutions at the same time!

We have partnered with Orvis Pasadena

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Join Vroman's Bookstore Gives Back program (it's free!) and choose ASF as your recipient organization. 

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Every time you make a purchase, a portion of the proceeds will be donated to the Arroyo Seco Foundation!

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Get involved!

  • Volunteer at the nursery

  • Become a Trout Scout

  • Save water and support native wildlife by landscaping with native plants

  • Donate to support the mission



P.O. Box 91622

Pasadena, CA 91109

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Donate now to support ASF's mission!

We are a 501(c)(3) nonprofit organization. You can support our conservation efforts by volunteering your time, or by making a tax deductible contribution.

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