| 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 | |||
| Unclassified | ±5.28 | ±2.74 | ±0.27 | ±0.30 | ±0.21 | ±0.34 | ±0.12 | ±0.22 | ±0.07 | - | - | 0.00 | ±5.98 | |
| Unspecified hardwoods | ±10.63 | ±7.46 | ±6.87 | ±3.58 | ±4.31 | ±0.50 | ±0.29 | - | - | - | - | 0.00 | ±15.73 | |
| Other hardwoods | ±0.97 | ±5.84 | ±18.04 | ±17.95 | ±15.10 | ±10.03 | ±3.30 | ±1.28 | ±0.23 | ±3.95 | ±7.59 | 0.00 | ±33.12 | |
| Unspecified conifers | ±15.52 | ±19.77 | ±10.20 | ±4.73 | ±0.81 | - | - | - | - | - | - | 0.00 | ±27.54 | |
| Larch | ±2.91 | ±5.73 | ±12.73 | ±16.42 | ±23.05 | ±20.45 | ±15.59 | ±11.17 | ±4.87 | ±2.89 | ±12.31 | 0.00 | ±44.42 | |
| Maple | ±4.50 | ±10.43 | ±42.57 | ±56.18 | ±58.84 | ±25.23 | ±9.38 | ±4.17 | ±7.38 | - | ±1.27 | 0.00 | ±96.74 | |
| Cedar & other conifers | ±1.72 | ±6.17 | ±18.79 | ±14.57 | ±13.95 | ±14.58 | ±9.18 | ±16.06 | ±12.60 | ±16.04 | ±189.60 | - | ±194.21 | |
| Birch | ±6.00 | ±20.17 | ±38.31 | ±42.77 | ±42.85 | ±28.29 | ±10.47 | ±7.68 | ±0.68 | ±1.49 | ±2.36 | 0.00 | ±80.95 | |
| Douglas-fir | ±1.03 | ±13.44 | ±50.05 | ±73.83 | ±60.84 | ±67.54 | ±74.56 | ±57.78 | ±22.73 | ±22.26 | ±93.64 | - | ±187.30 | |
| Hemlock | ±2.61 | ±21.49 | ±47.67 | ±61.04 | ±55.38 | ±27.29 | ±25.78 | ±22.19 | ±22.31 | ±19.23 | ±278.73 | - | ±299.99 | |
| Fir | ±7.38 | ±26.39 | ±38.62 | ±42.58 | ±43.77 | ±40.62 | ±38.53 | ±47.42 | ±51.52 | ±37.30 | ±181.97 | 0.00 | ±220.26 | |
| Pine | ±19.98 | ±47.19 | ±53.72 | ±88.71 | ±98.42 | ±96.15 | ±95.04 | ±76.69 | ±52.93 | ±28.33 | ±49.76 | 0.00 | ±230.89 | |
| Poplar | ±22.81 | ±43.06 | ±76.53 | ±139.21 | ±124.44 | ±98.29 | ±74.70 | ±45.19 | ±13.30 | ±12.61 | ±14.08 | 0.00 | ±246.80 | |
| Spruce | ±13.40 | ±50.19 | ±86.32 | ±126.57 | ±135.12 | ±234.28 | ±169.47 | ±108.86 | ±68.97 | ±37.03 | ±132.38 | 0.00 | ±404.40 | |
| Total | ±40.14 | ±94.94 | ±163.51 | ±245.12 | ±241.63 | ±287.96 | ±227.11 | ±162.22 | ±107.89 | ±69.80 | ±419.45 | 0.00 | ±713.51 | |
| 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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