Tree and log characteristics, wood properties, visually graded lumber yields, and machine-stress-rated (MSR) lumber yields were determined for 95 year-old lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) trees on good sites in southeastern British Columbia. A total of 220 trees were selected stratified by diameter-at-breast height (d.b.h.). Based on measurements of stand density made for plots around each sample tree, three samples were obtained which represented end-of-rotation stand densities of 700, 1100 and 1900 live stems/hectare (s/ha). Logs were sawn to maximize the yield of wide dimension lumber. Lumber recovery factor increased with increasing tree d.b.h. class, but due to greater stem taper, it was generally lowest for a given d.b.h. class in the 700 s/ha stand density class. Due to decreasing knot size, yields of Select Structural lumber increased as stand density increased (45.6, 62.5 and 65.4% for the 700, 1100 and 1900 s/ha samples respectively) but knots were small enough that a high proportion of lumber (> 90%) was visually graded No.2 & Btr. in all three stand density classes. Wood basic relative density was significantly inversely related to d.b.h., but was not significantly related to crown persistence or stand density. Lumber modulus-of-rupture (MOR) and modulus-of-elasticity (MOE) decreased as tree d.b.h. increased. Wide dimension lumber from open-grown trees generally failed to meet in-grade specifications for MOR and MOE. Lower MOR and MOE values were reflected in reductions in MSR yields. The juvenile wood proportion of tree stems, defined either as 15 or 30 annual rings from the pith, was only weakly related to lumber MOR and MOE. Kiln drying degrade increased with stand density class and ranged from 3% of pieces in the 700 s/ha sample to 7% of pieces in the 1900 s/ha sample. Drying degrade was essentially unrelated to proportions of juvenile wood. Application of study results to theoretical tree size and volume distributions generated by a stand growth and yield model (TASS) produced stand yields which in terms of lumber recovery, and premium structural and appearance grades, would rank stand densities in the following descending order: 1100, 700 and 1900 s/ha. Study results indicate that, for lodgepole pine grown on good sites, stand managers will achieve the optimal combination of lumber yield and grade by targeting a medium final stand density. Further research is underway to determine if the inverse relationship between average basic wood density and large diameter trees recorded in this regional study persists in other biogeoclimatic zones. It is important to note that, because the tree samples were stratified by d.b.h. and stand density classes, the lumber strength and stiffness results obtained in this study are not representative of the current lodgepole pine resource in general.