The San Juan Spruce is a Sitka spruce (Picea sitchensis) tree located in the San Juan Valley of Vancouver Island, British Columbia, Canada.

[3] The tree flourished due to its location on the shaded southern slopes of the San Juan Valley and on the banks of the San Juan River.

[citation needed] In July 2016, the San Juan Spruce lost significant height and mass due to a lightning strike.

[2] It is no longer considered among the largest Sitka spruce trees but its large diameter is still remarkable.

These measurements were taken sometime before 2010, at least six years prior to the tree's partial collapse.