Stewardship in Action: Tackling Invasive Thistles and Inspiring the Next Generation

Pittsburg High Diablo Conservation Experience at Mangini Preserve.
Pittsburg High School’s Diablo Conservation Experience at Mangini Ranch Educational Preserve. Photo by Emily Sherwood

Stewardship Update

Written by Haley Sutton, Land Stewardship Associate and Kendra Smith, Education & Outreach Coordinator

Stewards in the Field

stewardship retreat at Marsh Creek7

Stewardship retreat. Photo by Haley Sutton

Each Save Mount Diablo property has one or more property stewards who monitor the property each month and share a report of their observations with staff.

These visits help us have a regular recorded snapshot of the property each month and help notify staff of projects that keep properties in good working condition.

Each year, we also bring all our stewards together to visit a property they may not usually see, spend time with each other, and give back to the land with a stewardship project.

warrior's plume

Warrior’s plume. Photo by Kendra Smith

This past month, our volunteer property stewards joined staff at Marsh Creek 1 and 7 on a sunny day for our annual gathering, where we spent time weeding young invasive thistles from the pollinator garden.

It was a great time to be together! We appreciate our property stewards and all they do to help us care for Save Mount Diablo lands.

Staff also planted another round of 300 native grasses, shrub, and forbs at Marsh Creek 1 and 7, and observed that the California milkweed seedlings at Curry Canyon Ranch have begun sprouting in their new home.

Thistle Party!

Thistle Party!

Photo by Roxana Lucero

Our Diablo Restoration Team day this month was also held at Marsh Creek 1 and 7 to keep tackling the invasive thistles. Volunteers plucked out countless little thistles from the garden during another beautiful and sunny day.

Thank you to our volunteers that helped us remove just about every single thistle from the garden!

Discover Diablo

There were no Discover Diablo outings in February.

We are excited for our upcoming events in March, including the Green Hills, Ponds, and Newts hike at Briones Regional Park, and the On Belay – Rock Climbing outing at Pinnacles National Park!

Diablo Conservation Experience with Pittsburg High School

Pittsburg High School student shares her inspiring journal entry from our Diablo Conservation Experience at Mangini Ranch Educational Preserve

Pittsburg High School student Aira Genn Hordista shares her inspiring journal entry from her nature solo at our Diablo Conservation Experience at Mangini Ranch Educational Preserve. Photos by Ted Clement

On Friday, February 28, 46 students from Pittsburg High School participated in a field trip to Mangini Ranch Educational Preserve as part of the Diablo Conservation Experience program (formerly the Conservation Collaboration Agreement program).

The day was divided into two enriching activities. One group set out on an interpretive nature hike, culminating in a solo experience—an opportunity for quiet reflection and a deeper connection with nature.

Diablo Conservation Experience reflective solo

Each Diablo Conservation Experience includes a reflective solo. Photo by Emily Sherwood

Meanwhile, the second group took on a hands-on stewardship project, clearing trails to improve accessibility.

Armed with McLeods—versatile tools designed for scraping, loosening, and leveling soil—students worked diligently to make the trails safer and easier to follow.

After a peaceful lunch beneath the shade of a California buckeye grove, the groups switched roles. Those who had been clearing trails now embarked on their solo experience, while the others picked up tools to continue the stewardship work.

As students wrapped up their solo time, they shared reflections on their experience, revealing a noticeable shift in energy and perspective. A huge thank you to the Pittsburg High students for their hard work and dedication!

Pittsburg High Diablo Conservation Experience at Mangini Preserve.

Pittsburg High School students at their Diablo Conservation Experience at Mangini Ranch Educational Preserve. Photo by Emily Sherwood

Pittsburg High School students at Mangini Ranch Educational Preserve for their Diablo Conservation Experience

Pittsburg High School students at Mangini Ranch Educational Preserve for their Diablo Conservation Experience. Photo by Cecilia Zefeldt

Join us to save the remaining natural lands of Mount Diablo!

Make a Donation