It's a great time to visit the forest: the leaves are starting to change! Hope to see you soon.

TRAFFIC DELAYS- Visitors to the mountain may experience traffic delays  as CALTRANS begins work on Highway 18. The work is scheduled to be done Mondays through Fridays from 7 a.m. to 3 p.m., and involves closing one lane of traffic in each direction. The completion date is expected to be the spring of 2024. 

Please check weather conditions before driving up the mountain. Click on the snowflake button for a link to the National Weather Service page for Lake Arrowhead.

Hours & Events

Because of the wildlife in and around the Arboretum, it's potentially unsafe to visit the site and especially to hike the Sequoia Trail after dark. During daylight hours, that's not an issue.

The booth is now open on weekends only--from 11 a.m. to 3 p.m. However, because of our wonderful volunteers, the booth will also be open the week of Thanksgiving, Monday through Friday, also from 11 a.m. to 3 p.m. We accept cash and cards, but please note that the minimum credit or debit purchase is $10.

Enjoy our fall newsletter for even more updates!

Adventure Passes

An Adventure Pass or other valid pass (such as America the Beautiful) is required to park in the Arboretum’s lot–whether or not the Information Booth is open. As always, entrance to the Arboretum itself is free.

RESOURCEFUL! Find excellent information about our native plants and animals at. . .


Getting Here

We're in San Bernardino National Forest between Lake Arrowhead and Running Springs. The main routes leading to Heaps Peak Arboretum are Highways 18 and 330. (Caltrans highway info: 800.427.7623.)

29358 Rim of the World Hwy. 18
Skyforest, CA 92385
Directions & Parking

The forest is changing to its Fall colors.

You can sense the forest changing as winter approaches. We hope you can visit the Arboretum and see it in its glorious colors.

Explore the Forest

This family- and dog-friendly trail is nearly one mile long. Descending and then rising gently, it’s an easy hike with numbered signposts along the way. An information-rich trail guide, keyed to those numeric posts, makes your hike even more interesting and educational.

Photo: Anneke Fischle

The Arboretum’s gardens display a wide variety of flowers, shrubs and other plants. Largely native to the San Bernardino Mountains, many of them are identified by easy-to-read signs. The nearby Information Booth offers print and visual aids to help you learn even more!

Expertly guided tours are available on request. They’re intended especially for visiting groups such as schoolchildren, Boy and Girl Scouts, gardening clubs and birdwatchers. For details: info@hparboretum.com.

On the blog...


Through habitat restoration, trail maintenance and other efforts, we’re working to protect and conserve our area’s expanse of the National Forest.


Heaps Peak Arboretum has a diverse collection of mostly native trees, shrubs, wildflowers and other plants. Some of them might do well in your garden. Learn more at the Arboretum!

about us

Rim of the World Interpretive Association

Rim of the World Interpretive Association (ROWIA) is a California nonprofit, public-benefit corporation founded in 1982. In partnership with the U.S. Forest Service, we maintain and staff Heaps Peak Arboretum. 

We’re committed to protecting and conserving our natural resources for future generations to enjoy.