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
 Visitor Center
 Tuesday Crew (Year-Round, 8am-12pm)
 Saturday Crew (Seasonal, 9am-12pm)
 Schedule a Group/Corporate Volunteer Crew
 Trail Rover
 Website (Wordpress) | Digital Communications
 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.

Upcoming Volunteer Trainings

Arboretum Naturalist Training

First Session: Tuesday, August 14, 10am-12pm or Thursday, August 23, 10am-12pm
Second Session: Friday, August 24, 10am-12pm or Tuesday, August 28, 10am-12pm

Become an Arboretum Naturalist at Hoyt Arboretum! Arboretum Naturalists are volunteer educators who lead 90-minute field trips for elementary-age students to introduce them to the wonders of nature and the science of trees through fun hands-on activities.

Individuals with a love of the outdoors and an interest in environmental education are encouraged to apply (all volunteers must pass a background check). Gain valuable experience working with children and teaching environmental education in an informal outdoor setting. Training is provided. Read the full position description here

The fall field trip season runs from mid-September through November on Tuesday through Friday mornings. Arboretum Naturalists are encouraged to be available to volunteer for a minimum of 4 field trips per month during the fall season.

Volunteers will be required to participate in two training sessions. The first session is scheduled for Tuesday, August 14, 10am-12pm or Thursday August 23, 10am-12pm. The second session is scheduled for Friday, August 24,10am-12pm or Tuesday, August 28, 10am-12pm. Each training session will be limited to 15 participants. Please apply online here

If you have questions or are interested in becoming an Arboretum Naturalist but are unavailable for the training dates, please contact or (503) 823-1649.

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, sign up online here


Current Openings

Education: Become an Arboretum Naturalist and introduce youth to the wonders of nature by leading student field trips. The fall field trip season runs from September through November on Tuesday through Friday mornings. Training is provided. The next training session is scheduled on Tuesday, August 14 from 10am-12pm or Thursday, August 23, 10am-12pm. Apply online here. Questions? Contact or (503) 823-1649.

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: 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. Please email for next training session. Flexible schedule.

Website | Digital Communications: Do you have experience with Wordpress, website content management or writing content for digital communications? One to two volunteer positions are available. Flexible schedule

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 3 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 stewardship days. Visit the Events page for more details.