Arroyo Seco

Arroyo seco    Pasadena    California


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the effort

What is the One Arroyo effort?

The Arroyo Seco is Pasadena's great outdoor space, used by millions each year for recreation and enjoyment.  Even though the Arroyo itself has seldom been conceived or designed as one continuous space, from the headwaters in the North to the tributary waters in the South, its natural habitats, resources and historic sites are unlike any other and enthusiastically enjoyed by those who live, work and visit the city.

The One Arroyo effort endeavors to bring awareness to the work by the Arroyo Advisory Group (AAG), and others, to restore the legacy of Pasadena's historic Arroyo Seco and unite all three areas of the Arroyo- Hahamongna, Central Arroyo and Lower Arroyo under a singular vision.

the vision

Vision for the Arroyo

The AAG has developed the following draft vision statement for the Arroyo:  

"Pasadena's great outdoor space, the historic Arroyo Seco, will become One Arroyo.  From the headwaters in the north to the tributaries in the south, its valuable resources, including natural habitats, recreational and cultural venues, and historic sites, will be preserved, enhanced, and connected by an extraordinary end-to-end trail system."


the concept

One Arroyo Trail Concept

During the February 5 City Council meeting, the City Council endorsed the trail concept study allowing the AAG to proceed with a fundraising assessment to explore the fundraising potential for the demonstration projects.

It is anticipated that the results of the assessment will be shared in mid-late 2018, along with a final report to City Council by the AAG encompassing other considerations to preserve, enhance, and improve the Arroyo Seco.



about aag

About the Arroyo Advisory Group

The City Manager and the General Manager of the Rose Bowl Stadium selected an advisory group of Pasadena leaders who share:  a passion for the Arroyo Seco, financial acumen, and who are well-versed in the history and values of Pasadena.

The AAG was responsible for:

  • articulating a single vision statement to serve as a touchstone for the effort

  • engaging with, and receiving public input from the Pasadena community about the effort

  • exploring sustainable means of funding for the Arroyo

  • identifying a project or projects that capture the community's interest and further the vision

It is anticipated that the AAG will conclude its work with a final written report to City Council by the end of Fiscal Year 2018.


Opportunities to Connect

While there are no current outreach activities planned at this time, please check out footage and photos from One Arroyo Day here, as well as footage from the One Arroyo Community Outreach Kick-Off meeting in July 2017 here.


Learn More about the Arroyo Seco

The Arroyo Seco, Spanish for “dry gulch”, refers to both the stream course and the canyon that spans eight miles through the western portion of the City of Pasadena. Surrounded by urban development, the Arroyo Seco supports thriving natural ecosystems that include several native plant communities and provides shelter, food and nesting sites for hundreds of wildlife species. Affectionately known to locals as simply “the Arroyo”, the Arroyo Seco in Pasadena is protected parkland and open space with 22 miles of trails and myriad recreational opportunities. The Arroyo Seco was recently included in the National Register of Historic Places, placing it among the nation’s top cultural resources.

For more information, click here.

“Everybody needs beauty as well as bread, places to play in and pray in, where nature may heal and give strength to body and soul alike.”
— John Muir
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Contact AAG

The AAG is interested in hearing your ideas and feedback. Feel free to complete the attached contact form.  If you'd like to sign up for future news and updates regarding the One Arroyo effort, please complete the email list sign-up form at the bottom of the page.  We look forward to hearing from you!