Magnolia blossoms

Hoyt Arboretum Friends (HAF) is a membership-based, nonprofit organization working in partnership with Portland Parks and Recreation to support Hoyt Arboretum.

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Volunteering at Hoyt Arboretum

Volunteers play a very important role in helping Hoyt Arboretum grow. Opportunities are available in community science, education, stewardship, and visitor services, as well as project- and skills-based roles. Please review the list of current openings, or contact or (503) 823-1649 to learn more about the full range of opportunities. You can also complete the volunteer interest form below. 

Continue reading below for additional information about our volunteer programs. 

Volunteer Interest Form

 Arboretum Naturalist
 Project BudBurst
 Tour Guide
 Tuesday Crew (Year-Round, 8am-12pm)
 Saturday Crew (Seasonal, 9am-12pm)
 Schedule a Group/Corporate Volunteer Crew
 Trail Rover
 Visitor Center
 Other (Board/Committee/Project-Based)

Volunteer Programs at Hoyt Arboretum

Community Science

  • Herbarium Archivist: Create plant vouchers to document Hoyt Arboretum's tree collection
  • Invasive Rubus Community Science Project: Collect data in select Portland parks and natural areas to document the presence of non-native Rubus (blackberry) species
  • Project BudBurst: Collect data for a nationwide, community science-driven study of plant responses to changes in climate


  • Arboretum Naturalist: Lead field trips to introduce children to the science of trees through fun hands-on activities
  • Tour Guide: Lead interpretive tours to introduce visitors to Hoyt Arboretum, its tree and plant collections, and the arboretum’s role in global conservation


  • Tuesday Crew: Maintain the arboretum's trees and trails year-round with the Tuesday Crew 
  • Saturday Crew: Maintain the arboretum's trees and trails with the Saturday Crew, scheduled seasonally from April through October
  • Group and Corporate Volunteering: Schedule a volunteer opportunity for your group or company

Visitor Services

  • Trail Rover: Hoyt Arboretum's ambassadors on the trail
  • Visitor Center Representative: Oversee the Visitor Center and engage with guests to provide recommendations for their visit to the arboretum

Volunteers also support many other program areas, including administration and database management, outreach, photography, social media, and special events, as well as serving on committees and the board of directors.

Stewardship Volunteers

Hoyt Arboretum's Tuesday Crew was featured on an episode of Oregon Field Guide. See our volunteers in action during this great video segment!


To sign up to volunteer for Tuesday Crew, please email

To sign up to volunteer for Saturday Crew, please click here.

Upcoming Volunteer Opportunities


Tour Guides - Training Session Rescheduled to March 2 due to inclement weather.
Saturday, February 9

Hoyt Arboretum is recruiting volunteer tour guides for the 2019 tour season! Tour guides lead informative and entertaining 90-minute tours through the arboretum’s global tree collection to teach visitors about Hoyt Arboretum, its trees and plants, and the arboretum’s role in global conservation. Public tours are scheduled every Saturday and Sunday at 12pm from April through October. This volunteer position is a great opportunity for individuals with an interest in trees, plants, and conservation to expand their knowledge while developing public speaking and visitor engagement skills. View the Tour Guide position description here

**To apply for the Tour Guide program, please click here.**

Please join us at the Tour Guide training session on February 9 to learn more about Hoyt's public tour program. During the training, volunteers will learn best practices for tour guides including communication, visitor engagement, and tour content and become familiar with resources for expanding knowledge of trees and plants found in Hoyt Arboretum. New Tour Guides will be required to participate in a follow-up small group training session prior to leading their own tours.

Questions? Please email or call 503-823-1649.


Arboretum Naturalists - Information Session
Saturday, March 2

Since 1987, Hoyt Arboretum Friends has worked to connect students to our global tree collection through education; today, our school field trip program serves approximately 3,500 first through fifth grade students each year. This program is supported by volunteer Arboretum Naturalists, who lead groups of 10 students on two-hour field trips to explore the arboretum's trails and learn the science of trees through fun, hands-on activities. View the Arboretum Naturalist volunteer position description here.

Do you have a love of the outdoors and an interest in environmental education? Please join us at this informational session to learn more about Hoyt's school field trip and Arboretum Naturalist programs. Short interviews will follow the informational session to assess each participant's experience and interest in the volunteer position.   

**To apply for the Arboretum Naturalist program, please click here.**

If selected for the Arboretum Naturalist program, volunteers will need to attend three required training sessions prior to the start of the spring field trip season. The spring field trip season runs from April through mid-June on Tuesday through Friday mornings. Arboretum Naturalists are encouraged to be available to volunteer for a minimum of four field trips per month during the spring season.

Questions? Please contact or (503) 823-1649. 

Current Openings

Community Science: Volunteer for Project BudBurst to collect data for a community science-driven study of plant responses to climate change. A Project BudBurst training is scheduled for Wednesday, February 13 from 10-11am. 

Education: Become an Arboretum Naturalist to lead field trips and teach elementary-age students about the science of trees through fun, hands-on activities. An Arboretum Naturalist informational session is scheduled on Saturday, March 2 from 10-11:30am. Or become a Tour Guide to teach visitors about the arboretum's global tree collection during weekend tours from April through October. A Tour Guide training is scheduled for Saturday, March 2 from 12-2pm.  

Stewardship: Help care for the arboretum’s tree and plant collection and trail system. Volunteer crews are scheduled every Tuesday from 8am-12pm year-round (Tuesday Crew) and typically two Saturdays per month from 9am-12pm from April through October (Saturday Crew). Group and corporate volunteer opportunities are also available. 

Visitor Services: Volunteer in the Hoyt Arboretum Visitor Center. Current openings for weekend and weekday substitute volunteers. Or become a Trail Rover and volunteer as an ambassador on the arboretum's trails; walk the trails to make contact with visitors to answer questions, give directions and share special points of interest. 

Volunteer opportunities are also available for individuals interested in leadership roles (board and committee), storytelling, and project-based opportunities. 

To learn more, please email volunteer@hoytarboretum.orgcall (503) 823-1649 or submit the volunteer interest form on this page. 

Thank you for helping Hoyt Arboretum grow!

Group or Corporate Volunteering

Volunteering is a great way for your group or company to learn more about one another, build camaraderie, and give back to the community. There is always a place for your group or team to learn, play, and volunteer at Hoyt Arboretum!

Group volunteers have a unique opportunity to care for rare and unusual trees and plants from around the world with projects that can include trail work, pruning, weeding, mulching, and removing invasive species. Opportunities are available year-round and take place rain or shine! Gloves and tools are provided. 

If you're interested in a group volunteer opportunity, please email or call (503) 823-1649 with your group size, preferred dates and times. At least 4 weeks advanced notice is appreciated. Tuesday, Wednesday, and Friday mornings (9am-12pm) usually work best. Your group is also welcome to join our Saturday Crew or one of our community stewardship days. Visit the Events page for more details.