| Species group | Age (years) | Total | ||||||||||||
| 1-20 | 21-40 | 41-60 | 61-80 | 81-100 | 101-120 | 121-140 | 141-160 | 161-180 | 181-200 | 201+ | Other1 | |||
| Unspecified hardwoods | ±6.95 | ±5.19 | ±4.87 | ±2.66 | ±3.02 | ±0.36 | ±0.20 | - | - | - | - | <0.01 | ±10.74 | |
| Unclassified | ±3.04 | ±1.57 | ±0.17 | ±0.27 | ±0.16 | ±0.24 | ±0.13 | ±0.19 | ±0.05 | - | - | ±5.02 | ±6.09 | |
| Other hardwoods | ±0.74 | ±3.64 | ±10.94 | ±11.46 | ±9.86 | ±5.83 | ±1.96 | ±0.89 | ±0.11 | ±2.10 | ±4.17 | ±0.05 | ±20.55 | |
| Unspecified conifers | ±9.36 | ±12.11 | ±6.38 | ±2.87 | ±0.52 | - | - | - | - | - | - | ±0.03 | ±16.84 | |
| Larch | ±3.29 | ±2.89 | ±6.74 | ±8.89 | ±12.43 | ±11.05 | ±8.17 | ±6.09 | ±2.83 | ±1.81 | ±6.90 | ±0.14 | ±24.15 | |
| Cedar & other conifers | ±1.23 | ±4.15 | ±10.62 | ±8.28 | ±7.92 | ±8.02 | ±5.13 | ±8.52 | ±7.08 | ±9.15 | ±99.95 | - | ±102.71 | |
| Birch | ±3.45 | ±13.31 | ±25.35 | ±27.78 | ±28.32 | ±18.32 | ±6.40 | ±4.84 | ±0.42 | ±0.80 | ±1.40 | ±0.02 | ±52.99 | |
| Maple | ±3.62 | ±7.95 | ±31.71 | ±42.60 | ±43.82 | ±19.09 | ±6.66 | ±3.23 | ±5.08 | - | ±0.73 | <0.01 | ±72.54 | |
| Douglas-fir | ±1.34 | ±9.93 | ±31.65 | ±44.60 | ±35.74 | ±39.66 | ±43.29 | ±33.13 | ±14.33 | ±13.96 | ±55.60 | - | ±111.37 | |
| Hemlock | ±2.69 | ±13.97 | ±27.47 | ±33.20 | ±30.06 | ±15.10 | ±14.50 | ±12.47 | ±12.50 | ±11.15 | ±146.80 | - | ±159.33 | |
| Fir | ±5.12 | ±17.81 | ±25.00 | ±27.96 | ±28.40 | ±24.14 | ±22.35 | ±27.52 | ±28.12 | ±22.24 | ±94.78 | ±0.04 | ±121.10 | |
| Pine | ±10.16 | ±26.28 | ±32.39 | ±49.08 | ±54.00 | ±52.31 | ±50.13 | ±40.84 | ±25.85 | ±14.31 | ±26.62 | ±0.05 | ±125.17 | |
| Poplar | ±12.20 | ±23.85 | ±43.58 | ±78.29 | ±71.19 | ±53.93 | ±39.20 | ±23.59 | ±6.30 | ±6.59 | ±7.72 | ±0.01 | ±137.69 | |
| Spruce | ±7.40 | ±28.03 | ±55.94 | ±75.99 | ±82.30 | ±135.58 | ±102.62 | ±73.86 | ±38.69 | ±21.05 | ±72.47 | ±0.32 | ±240.99 | |
| Total | ±22.91 | ±55.78 | ±102.22 | ±145.15 | ±144.19 | ±165.32 | ±131.70 | ±99.17 | ±58.66 | ±39.96 | ±222.94 | ±5.03 | ±406.47 | |
| Source: Canada's National Forest Inventory, combined remeasured (2007-2017) and projected (2006-2017 with NFI projection system) data (Version 3.1, October 2025) (http://nfi.nfis.org) | ||||||||||||||
| Note: The Arctic ecozones (Arctic Cordillera, Northern Arctic, Southern Arctic), and the Taiga Plains and Hudson Plains ecozones located in Nunavut, are not inventoried. These non-inventoried areas total 262,189.89 thousand ha. | ||||||||||||||
|
1 Missing or unknown age class. |
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