Sign Up to Volunteer Register a Site

If you are interested in contributing your time and energy to buffelgrass control, there are a variety of ways in which you can get involved and help.

If you cannot participate in physical pulls, there is still the opportunity to foment this effort through a monetary donation.

Donate Here

Here at the Desert Museum we want to help you find opportunities to help save our saguaros, while also learning about the Sonoran Desert and having fun while you do it!

Why: Buffelgrass is invasive grass species that has established a strong foothold in the Tucson Basin. Buffelgrass and saguaros cannot coexist. Buffelgrass outcompetes saguaros for space, nutrients and water, slowly eliminating saguaros from the landscape. It also poses a serious fire risk, burning hot and fast. Can you spare a couple of hours to save a few saguaros or reduce the risk of catastrophic fire to our community?

How: If you are interested in volunteering, Sign Up to Volunteer and you’ll be taken to a list of action events across the region. If you’d like to host a buffelgrass pull in your own neighborhood, your favorite park, or elsewhere, Register a Site, and it will be added to our list of sites for volunteers to choose from.

**Not all activities listed here are through the Arizona-Sonora Desert Museum. Each organization registering on this site takes responsibility for their own event.

Regularly Scheduled Pulls

Sonoran Desert Weedwackers & Wednesday Weedwackers

The Sonoran Desert Weedwackers were organized in September 2000 and the Wednesday Weedwackers in February of 2007. The Weedwackers are dedicated to removing buffelgrass and other invasives from Tucson Mountain Park. They work every third Saturday of the month year-round for about three hours. A smaller group also works on the second and fourth Wednesdays of the month for about four hours.

Originally the Weedwackers were supported by the Desert Museum. Pima County began supplying van transportation, bags, tools and gloves in 2002, and, since 2005, has also been helping with publicity. The Weedwackers could not continue without the support of Pima County personnel, including Doug Siegel and others. The Arizona Native Plant Society has also supported the Weedwackers from the beginning by paying for brochures and road signs.

Average Number of Volunteers for Saturday Events:
depends on the season, 12-15 during the school year, 8-12 during the summer, 470 people on the e-list.
Average Number of Volunteers for Wednesday Events:
between 4-10 volunteers. These folks are regulars!
Meeting Time:
third Saturday and second and fourth Wednesday of each month.
Location of pulls:

Tucson Mountain Park. Initial work was carried out near the Desert Museum, and included clearing all of the washes above and below the Museum. The group then concentrated on the roadsides throughout the park. Since 2007, most of the effort has been directed towards clearing large infestations on the upper slopes of Tucson Mountains. In 2006 and 2008 much time was spent clearing a huge patch on the south face of Brown Mountain. For six months in 2007-2008 volunteers cleared the Trail’s End Wash, which was completely choked with fountain grass and buffelgrass. In March of 2009 weedwackers found the wash mostly clear of invasive grasses.

The Wednesday Weedwackers climb higher and work longer. They tackle the hard spots that would be difficult for the Saturday volunteers. Since September 2007, they have been working on the south-facing slope of Bushmaster Peak. They continue to remove patches of buffelgrass from that slope.

Seven miles of washes have been monitored in Spring 2008. The washes are mostly clear of invasive grasses, verifying that manual digging has been effective.

  • Doug Siegel, Natural Resource Specialist, Pima County Natural Resources Parks & Recreation, 520-724-5177,

Data points showing the activity of the Sonoran Desert Weedwackers (2000-2008)


Saguaro National Park

The park began hosting regular group buffelgrass pulls (now called "buffelgrass parties") in October, 2007. Park staff hike new and returning volunteers to patches of buffelgrass and provide training and supervision in safely digging up buffelgrass, fountaingrass, and other invasive grasses. Events usually last about 4 hours. Over the years, we have eliminated patches closest to the roads, so now it usually takes about 30-45 minutes to reach the patches. At least some of the hiking is off-trail, and terrain can be steep and rocky. We have multiple buffelgrass parties each month from October to March, and sometimes in April. The park provides tools and gloves.

Become a "Saguaro Steward" with a more significant commitment:
With experience and training, people can sign up to become Weed Free Trail volunteers. These volunteers hike trails within the park and remove our priority invasive plants, which include invasive grasses as well as some winter annual herbaceous plants. Weed Free Trail volunteers work on their own schedule and as often as they want, and they can coordinate with other volunteers about which areas have been recently covered or need to be covered.

A brand new volunteer program was officially kicked off in January, 2022. Adopt-an-Area volunteers have similar training as Weed Free Trail volunteers, and likewise operate independently. Volunteers work with park staff to select areas to adopt, picking places and terrain of their liking. They work on their own schedule as often as they wish.

Both Weed Free Trail volunteers and Adopt-an-Area volunteers can recruit friends and family to help them, and the volunteer supervises them to ensure they are killing invasive plants, and not native plants.


Catalina State Park Buffel Slayers

The Buffel Slayers work to rid Catalina State Park of buffelgrass. They go out once per month September through May, taking a break over the summer. For a list of upcoming events see our buffelgrass pulls calendar. Events run from 8 am to noon, though it’s not necessary to work the entire time. Please contact Patty Estes at for more information.

Coronado Foothills Weedwackers

The Coronado Foothills Weedwackers work on the 1st and 3rd Saturdays of each month. We generally work Skyline Rd., north of Skyline Rd between Campbell and Swan, and the Finger Rock wash. In the summer we start at 6:30 a.m. working for 1 1/2 hours, and in the winter at 7:00 a.m. for 2 hours. Please contact Marge at for exact time and location. If you have a digging bar and/or pick, bring them. Always wear sunscreen and bring gloves and water.

East Tucson Weed Busters

Usually scheduled on the last Saturday of the month starting at 8:00 a.m. Please contact Karla Lehmann for details —

Always wear sunscreen or a hat, and sturdy shoes. Bring water, gloves and any tool you prefer working with.

  • Coming from the west: Take Craycroft Rd. heading north; turn right onto E. River Road; turn Left onto N. Tanuri Dr.; stay on Tanuri by keeping left; take the first left onto N. Calle Vista Ciudad; turn right into N. Wilmot Dr., which ends or forces a left turn onto E. Avenida Arriba. You can park by the right shoulder of N. Wilmot Dr.
  • Coming from the east: Take River Rd. heading west; turn right onto Tanuri Dr; continue with directions above.
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