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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Upcoming Events & Classes

Celebration of Tu BiShvat Nature Walk

Monday, January 21
11am-12:30pm
$3 suggested donation, HAF members free!

Join us for a celebration of Tu BiShvat. This Jewish holiday is known as the new year for trees and marks the season for early tree blooms. We will be going on an hour-long walk of the arboretum, highlighting fruit trees and blossoming trees. Following the walk will be a brief reception with refreshments and some traditional Tu BiShvat foods. 

Registration is not required; please meet at the Visitor Center. 


Trail Rovers - Training Session - FULL

Tuesday, January 22
1-2:30pm
Volunteer opportunity!

Trail Rovers are Hoyt Arboretum’s ambassadors on the trail; they share their knowledge of Hoyt Arboretum’s trails, trees, and special points of interest with visitors and help maintain Hoyt Arboretum as a world-class destination by reporting maintenance and other issues to arboretum staff. View the volunteer position description here

If you're looking for an outdoor volunteer opportunity with a flexible schedule, please get in touch! This training session is full. A new session is on the schedule for Tuesday, February 19 from 1-2:30pm. For more information or to sign up for the training, please email volunteer@hoytarboretum.org or call (503) 823-1649.


Wildlife Tracking

Saturday, February 9
9am-12pm
$15/member, $20/non-member

Portland's parks and natural areas are home to many different kinds of wildlife. Many animals are hard to see directly, but you can know about their presence through the tracks and signs they leave behind. In this class, you will learn the basics of wildlife tracking and will explore Hoyt Arboretum to see what mammals have been living here. 

About the instructor: Teri Lysak has been teaching wildlife tracking and wild plant foraging for over 10 years and runs a community science project for Cascadia Wild searching for rare mammals on Mt Hood. Previously, she worked as a forester and holds an MS in Forest Ecology from Oregon State University.

Class size is limited to 15 participants; registration is required. Recommended for ages 15 and up. $15/member, $20/non-member. Sign up with Paypal below, or call (503) 823-1649. There are no refunds for cancellations within two weeks of the class date.

Member / Non-Member


Tour Guides - Training Session

Saturday, February 9
12-2pm
Volunteer opportunity!

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 volunteer@hoytarboretum.org or call 503-823-1649.


Project BudBurst - Training Session

Wednesday, February 13
10-11am
Volunteer opportunity!

Project BudBurst is a nationwide, community science-driven effort designed to study plant responses to changes in climate. Volunteers are needed at Hoyt Arboretum to monitor the timing of specific events in a plant's life history known as phenophases (E.g., full bloom, fruiting, etc.) and report their observations to Project BudBurst.

A Project BudBurst training is scheduled for Wednesday, February 13 from 10-11am. During this training, volunteers will learn about plant structures and phenology and choose a specific plant to monitor at Hoyt Arboretum. More information about this nationwide project is at http://www.budburst.org/.

If you're looking for an outdoor volunteer opportunity with a flexible schedule, please get in touch! For more information or to sign up for the training, please email volunteer@hoytarboretum.org or call (503) 823-1649.


Trail Rovers - Training Session

Tuesday, February 19
1-2:30pm
Volunteer opportunity!

Trail Rovers are Hoyt Arboretum’s ambassadors on the trail; they share their knowledge of Hoyt Arboretum’s trails, trees, and special points of interest with visitors and help maintain Hoyt Arboretum as a world-class destination by reporting maintenance and other issues to arboretum staff. View the volunteer position description here

If you're looking for an outdoor volunteer opportunity with a flexible schedule, please get in touch! For more information or to sign up for the training, please email volunteer@hoytarboretum.org or call (503) 823-1649.


Arboretum Naturalists - Information Session

Saturday, March 2
10-11:30am
Volunteer opportunity!

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 an informational session on Saturday, March 2 at 10am 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 volunteer@hoytarboretum.org or (503) 823-1649. 


Birding 101 Workshop

Saturday, March 9
9am-12pm
$15/member, $20/non-member

Birds are everywhere you look, but how to figure out which one is which? This workshop takes the mystery out of bird observation and identification by giving you the tools to see the whole bird—not just its color, but its shape, size, pattern, behavior, and more.

In this class, longtime birder and teacher Laura Whittemore will introduce you to the questions you should ask when faced with a mystery bird. During a slide presentation of local common species, you'll learn to see beyond a bird's color and consider other physical and behavioral characteristics that will tell you about a bird's identity and life history. Use your new awareness on a walk around Hoyt Arboretum as you learn to detect birds by moving slowly, being patient, and using your ears and eyes.

About the instructor: Longtime birder and teacher Laura Whittemore loves to show beginners the tricks of the trade. She has taught classes for Audubon Society of Portland and previously worked for Backyard Bird Shop, where she helped bird-feeding enthusiasts ID those confusing little brown birds. Laura holds a BA in Biology from Lewis and Clark College and has traveled in the US, Australia, South Africa, and Antarctica in search of birds.

Class size is limited to 15 participants; registration is required. Recommended for ages 15 and up. $15/member, $20/non-member. Sign up with Paypal below, or call (503) 823-1649. There are no refunds for cancellations within two weeks of the class date.

Member / Non-Member


Magnolias, Bay Trees and Buttercups! An Introduction to Characteristics of the Early Flowering Plants

Monday, April 8
9am-12pm
$15/member, $20/non-member

What do magnolias, bay trees, buttercups, along with the barberries have in common? They are all considered as some of the first-evolved flowering plants. Sometimes referred to as the basal angiosperms and eudicots, these plants have several primitive characteristics that we can easily observe and identify at the family level. Join us as we explore the flowers of these plants in the classroom, then on a short walk through the arboretum. Be prepared for the weather with good walking shoes, rain gear, etc.

Class size is limited to 15 participants; registration is required. Recommended for ages 15 and up. $15/member, $20/non-member. Sign up with Paypal below, or call (503) 823-1649. There are no refunds for cancellations within two weeks of the class date.

Member / Non-Member


Wildflowers of Hoyt Arboretum

Monday, April 22
9am-12pm
$15/member, $20/non-member

While the Hoyt Arboretum is known as a living museum of trees from around the world, did you know that the arboretum also has extensive natural areas with many native wildflowers? Join us for a short classroom session, then a longer outside walk while we explore and identify many of the common wildflowers that are typical of the Portland area. Be prepared for the weather with good walking shoes, rain gear, etc.

Class size is limited to 15 participants; registration is required. Recommended for ages 15 and up. $15/member, $20/non-member. Sign up with Paypal below, or call (503) 823-1649. There are no refunds for cancellations within two weeks of the class date.

Member / Non-Member
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