This study, under contract with the British Columbia Ministry of Forests Silviculture Branch, is part of a ten-year re-measurement of the influence of squirrel damage on tree growth and wood quality in 25 year-old lodgepole pine (Pinus contorta var. latifolia (Engelm)). The damaged trees were surveyed and identified immediately after thinning in 1979. In 1989 (September), 18 control and 18 damaged trees were sampled by cutting a 1.27 m long bolt from each tree above stump height. Because squirrel damage is usually restricted to the lower portions of the stem, these bolts contained all the damage. As a measure of wood quality, the following properties were investigated: compression wood distribution, relative density, ring width, fibre length, total solvent and water extractives. On average, the scarred trees did not produce more compression wood than the controls. In the last nine years of growth, from 1981 to 1989, the control trees contained rings with an average width of 2.8 mm and average relative density of 0.42. In the same interval, the squirrel damaged trees produced 4.2 mm-wide rings (an increase of 50%), with an average relative density of 0.46 (an increase of 7%). In terms of fiber length, the wound tissue in the damaged trees contained about 22 percent shorter fibers than the control trees (1.4 mm compared with 1.8 mm). On average, the squirrel-damaged trees had lower total solvent and water extractives than the undamaged lodgepole pine reference trees; 7.7 compared with 8.7 percent. In addition to the above quantifications of wood quality, a literature survey summarized the salient results of other workers examining the properties of wound-associated wood versus normal wood tissue.