Pretty? Or pretty dangerous?

Non-native weeds can invade anywhere. Neighborhoods. Meadows. Wilderness. In fact, there are over 2,800 infestations of nearly 60 non-native invasive plant species in the Truckee River watershed.

We’re attacking over 2,000 acres of infestation in several ways. We collaborate on major weed removal efforts with the US Forest Service and California Department of Fish and Wildlife. Additionally, we run programs involving local citizens, landowners, land managers and public agencies.

What’s under attack?

  • Native species
  • Wildlife habitats
  • Fire suppression
  • Fishing and birding

2 ways to join
 Weed Warriors

The war on invasive species is complex. First we identify the enemy (and it’s tricky.) Then we attack—but different weeds require different tactics.

1. Weed Walks

Learn to differentiate imposters from their native look-a-likes. Visit up to 10 sites, including on-going eradication projects and sites ready for investigation.

Acquire the information, guidance and materials to help identify, treat and report weeds back in your own neighborhood.

2. Weed Pulls

Participate in hands-on, group eradication of specific infestations under the leadership of a trained botanist. Learn identification and removal techniques as well as critical disposal methods. If not done properly, simply pulling unwanted plants can actually stimulate invasion.

 a Weed

Invasive Weeds Guidebook

Noticed a suspicious infestation in your neighborhood—or on your favorite hike? We urge you to report your findings.

Identity Infestations

Not sure who’s a native…? And who’s an imposter…?

Download this 35-page guidebook—specific to our watershed area—to help you root out culprits. (You can even download it to your phone for handy reference in the field.)

Report Imposters

Whenever you track down invasive weeds, don’t keep it to yourself. Help us win the battle by contacting our “Early Detection, Rapid Response” specialist. And include a photo if you have one.

Got a question? Call Sam Zabell at 530.550.8760 x3# or email at


A native flower: the Anderson Thistle
An invasive flower: the Bull Thistle

Above: a native Anderson Thistle. Below: an invasive Bull Thistle.

Left: a native Anderson Thistle. Right: an invasive Bull Thistle.

Weed Warrior
 Fast Facts


Weed Walks

Weed Pulls

Report a Weed

Where: Designated areas throughout the watershed
When: Summer months (May-September)
Length of Events: 2-4 hours, may include snacks
Size of Events: 8-10 people