Friends of Tierrasanta Canyons

05/07/2026

Fiesta of Los Peñasquitos

Saturday, May 9, 2026
12:00 PM 5:00 PM
Black Mountain Road, between Twin Trails and Carmel Mountain

We’ll be at the Fiesta, come visit our booth for info on the Canyon, our guided hikes, restoration projects, and games!

05/07/2026

By Del Brooks The west end of Los Peñasquitos Canyon Preserve is undergoing a well-deserved and much needed period of ecological restoration. There are currently seven active restoration sites managed by The Friends of Los Peñasquitos Canyon Preserve and one major habitat creation project being

07/03/2025

06/03/2025

05/23/2025

Happy Friday! Here is the latest information from Cuyamaca.

🏕 This Memorial Day, Monday, May 26, 2025, Cuyamaca will be offering free day use to veterans, active, reserve and retired military. Please bring one of the following ID Cards for free day use: CA driver’s license with veteran designation, honorable discharge papers, current military ID, Veteran’s Administration ID, Common Access Card or Uniformed Services ID card.

🔍 Saturday there will be the following programs:

Paso Picacho Day Use
9 a.m.-Junior Rangers: Watersheds
Join interpreter Michele and learn about
watersheds and how important they are
for all of us.

Green Valley Campfire Center:
11 a.m.- Horses 101
Come and learn about horses.
5 p.m.- Sheriff’s K-9 Search and Rescue
Learn about what these dogs do and how they do
it and the training required.

Sunday at the Visitor Center
10 a.m. to Noon: Cuyamaca Creative Art in the Park
Supplies are provided to all who would like to create a memento of their visit to Cuyamaca.

05/19/2025

Starting TODAY, May 19, the East County Advanced Water Purification Project will begin construction along Father Junipero Serra Trail (FJST).

Here’s what to expect:
- FJST will be closed to vehicle traffic through late 2028.
- The closure spans between the two vehicle gates near the Visitor Center and Old Mission Dam.
- The trail will remain open to pedestrians, cyclists, and hikers, except during occasional temporary closures.
- There will be no vehicle access to Climber's Loop, Oak Grove, or Grinding Rocks trailheads during this time.

The Visitor Center parking lot will remain open until 7PM during Daylight Saving Time unless there's a special event at the Visitor Center. If you have any questions regarding this project, visit the East County Advanced Water Purification website or email [email protected].

PC: Angie Ollman

05/16/2025

Let's get outside and make a difference for the San Diego River tomorrow morning from 9 am - 12 pm in celebration of River Days! Join us for a fun and meaningful cleanup at Mission Valley Preserve — a hidden gem right in the heart of San Diego. Just steps from city roads, this 52-acre wildlife preserve is home to an abundance of native plants and animals.
Help us protect this precious riparian habitat by removing trash from the riverbed before it reaches our ocean and beaches.
Bring your friends and your love for nature to make a lasting impact for the San Diego River and your community! We would love to see you there! Sign up here: https://sdriverdays.org/

04/30/2025

4-S Ranch Hike to Lake Hodges with Beth Mather

Saturday, May 3, 2025
9:00 AM 11:00 AM

Join naturalist Beth Mather for an easy 2-mile roundtrip hike from the northern edge of 4-S Ranch to an overlook of Lake Hodges. See the rare white blooming Ceanothus verrucosus (wart stemmed ceanothus). Gentle slope. Great vistas and wildflowers.

Meet at the north end of Hunter’s Ridge Rd. where it meets Alva Rd. in 4-S Ranch.

Sponsored by the Friends of los Peñasquitos Canyon Preserve.

02/27/2025

The Friends of Tierrasanta Canyons is no longer active. For environmental volunteer opportunities, check out the San Diego River Park Foundation and I Love A Clean San Diego. Both environmental groups have opportunities nearby and countywide.

To report a hazard in the canyon, use the City of San Diego's Get It Done app.

For issues or concerns about the canyon or the community, please attend a Tierrasanta Community Council meeting.

Thank you for your help over the past many years!

01/20/2025

The Tierrasanta MAD (Maintenance Assessment District) will be meeting this week:

MAD meeting (open to the public)
Tuesday, January 21, 2025
6 pm
Serra Mesa Public Library
9005 Aero Drive, San Diego

Agenda in comments.

Any questions, contact Jennifer at [email protected].

10/17/2024

VOLUNTEER OPPORTUNITY: Join San Diego Bird Alliance as we restore habitat for birds and other local wildlife!

We will be removing invasive weeds and planting native plants along the Sweetwater Bike Path on Friday, October 18, from 9:30 AM to 1 PM.

All supplies will be provided including tools, gloves, water and snacks, but come prepared in a hat and closed-toe shoes and bring a reusable water bottle.

The planting location is near the Sweetwater Marsh in Chula Vista. Detailed directions will be emailed after registration.

Register here: https://secure.sandiegobirdalliance.org/np/clients/sandiegobirdalliance/event.jsp?event=10314