The H.R. MacMillan - Grant Ainscough Arboretum is one of the most diverse tree collections in British Columbia. An arboretum is a place where many kinds of trees are grown for learning, research, or enjoyment—similar to a botanical garden. This 2.6‑hectare arboretum includes both natural forest, featuring Douglas‑fir, bigleaf maple and grand fir and an old farm field planted with native and non‑native species from around the world. Today, you’ll find about 120 different tree species along the trails. 

The arboretum is used by universities and schools for forestry and botany studies. It’s also a peaceful place for a walk. Feel free to explore, observe and enjoy.

A Living Collection Since 1956

The arboretum was established in 1956 by MacMillan Bloedel Ltd. to compare how different tree species grow in this region. Researchers studied survival, growth, tree form and resistance to insects and disease. Trees were originally planted in blocks of 25, but the pattern has changed over time due to thinning, natural loss and new plantings.

What You’ll See

Look for species signs throughout the site. Each sign shows:

• Common and scientific names
• Where the tree grows naturally
• The year it was planted

Most species now have between one and eight surviving trees.

Community Stewardship

A dedicated group of former MacMillan Bloedel employees and local volunteers helps care for the arboretum each year. They prune, thin, clear branches, maintain fencing and update tree signs. They also help preserve the history and records of this special site.

Interested in volunteering? Please contact RDN Parks.