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California Native Plant Society

Santa Clara Valley Chapter

Habitat Restoration at Edgewood: Edgewood Weed Warriors


Though just 467 acres, Edgewood County Park near Redwood City is widely known for fabulous wildflowers and amazing diversity.  But did you know it’s also an official Natural Preserve, and the only one in the San Mateo County park system?  As a Natural Preserve, its goal is to protect native species, including over 300 native plants!  And that’s where YOU can help.

Invasive, non-native “weeds” displace native plants and reduce diversity.  But dedicated park staff and volunteers, in a collaboration between San Mateo County Parks & Recreation, The California Native Plant Society (CNPS), and Friends of Edgewood Natural Preserve, work to control the weeds so natives have plenty of room to flourish.

Want to help preserve this natural treasure?
VOLUNTEER with our Edgewood Weed Warriors restoration team!

You’ll be able to:

  • Learn about native plants, weeds, and ecology from local experts
  • View rarely seen plants up close at our work sites
  • Meet other volunteers with similar interests
  • Keep Edgewood native while getting fresh air and exercise in a BEAUTIFUL setting!

There’s lots to do so EVERYONE is welcome, whether every week, occasionally, or just once.  No experience is necessary, just volunteer spirit and an interest in Edgewood.


  • DON’T DO THIS ON YOUR OWN!  Plant removal & going off trail require a permit. 
  • Teens must each be accompanied by one of their own parents; unaccompanied adult students must have proof of age. 
  • Large groups should call ahead to make special arrangements.
  • Sturdy gloves are recommended; you might also want: sunscreen, water, a hat, layered clothing, long sleeves/pants.

Hope to see you soon at one of our work outings!


Our volunteer restoration program at Edgewood Park has run for over 25 years.  Known as the Edgewood Weed Warriors (EWW for short), the program has made amazing progress, yet there’s still so much we can do to make Edgewood an inspirational showcase of all CNPS stands for!  To learn more about the past history of EWW, and what challenges lie ahead, check out:

Restoration Sessions

We have two sessions each week:

  • 9 am Friday sessions run year round. Meeting locations are determined weekly. Check after Wednesday of each week for the map showing the next weeding session. Here are the written instructions for finding the locations.
  • 5:30 pm Wednesday sessions run during Daylight Savings Time. The Wednesday weeding location is announced every Monday via email to the EWW email distribution list. For more information contact Ken Himes, Wednesday Leader (650-591-8560).

For more information join the EWW email distribution list or view the EWW group page. A map to the work site will be posted at the meeting point to accommodate late arrivers

How To Get There

Edgewood is at I-280 and Edgewood Rd in San Mateo County, just west of Redwood City:

  • From I-280 Simply exit at Edgewood Road
  • From Highway 101 Take Whipple Ave west ~2 miles, turn right onto Alameda de las Pulgas, go ~¼ mile, turn left onto Edgewood Rd, and go ~2 miles more to the park

Here's an overview map of Edgewood including main weeding areas, parking locations, trails, and more.

Note that our meeting/work sites vary from session to session, so please contact us ahead of time or check the website for meeting locations.

EWW Email Distribution List

We have an email distribution list for those who want to receive the latest EWW info, including schedules, weekly Friday and Wednesday meeting locations, special events/offers, and more. There are two ways to subscribe to the list:

  • Send email to This email address is being protected from spambots. You need JavaScript enabled to view it. (case doesn't matter, and the message subject/body are ignored). The email address you are sending from should receive a response asking you to reply in order to confirm that you want to subscribe... go ahead and reply and you should then receive a subscription confirmation.
  • To add a different email address than the one you are sending from, go to the list's online subscribe page and enter the address you want to add (you might need to make sure you're not currently signed in to a google account for this link to work properly).  That address will receive an email asking them to confirm they want to join the list.

Emails sent via the list will have "[EWW]" at the start of the subject line, for easy identification.  Past messages to the list can be viewed at the online group page.

Directions for unsubscribing to the list are included at the bottom of every email sent via the list. 

EWW Contacts

The EWW program is led by the following on behalf of CNPS:

  • Ken Himes, Wednesday Leader (650-591-8560)
  • Paul Heiple, Friday Leader (650-854-7125, This email address is being protected from spambots. You need JavaScript enabled to view it.)

Our program operates under permission from and/or in partnership with:

    • County Parks Edgewood page
    • Edgewood ranger:  Joel Cervantes (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Outreach Materials


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