| Terrestrial ecozone | Forest type | 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 | |||
| Taiga Plains | Non-treed | 60.18 | 70.48 | 99.95 | 77.95 | 95.26 | - | - | - | - | - | - | 24.78 | 23.11 |
| Treed Mixedwood | 18.88 | 16.90 | 16.87 | 11.30 | 11.53 | 6.43 | 15.46 | 18.39 | 37.44 | 67.78 | 70.45 | - | 4.41 | |
| Treed Broadleaf | 21.58 | 17.23 | 16.95 | 14.01 | 8.11 | 17.77 | 25.53 | 31.08 | 64.41 | 99.99 | - | - | 5.94 | |
| Treed Coniferous | 18.78 | 11.57 | 9.69 | 8.75 | 7.44 | 3.00 | 9.95 | 14.14 | 18.94 | 34.55 | 36.41 | - | 2.47 | |
| Subtotal | 12.10 | 8.41 | 7.68 | 7.17 | 5.22 | 2.72 | 8.97 | 11.61 | 16.74 | 32.92 | 32.35 | 24.78 | 2.07 | |
| Taiga Shield | Non-treed | - | - | 99.98 | 98.78 | 97.63 | - | - | - | - | - | - | 4.71 | 16.16 |
| Treed Broadleaf | 26.35 | 29.74 | 53.61 | 32.03 | 36.87 | 7.94 | 79.68 | - | - | - | - | - | 7.32 | |
| Treed Mixedwood | 22.42 | 20.83 | 26.61 | 34.78 | 22.24 | 13.65 | 7.14 | 55.20 | - | - | - | - | 5.80 | |
| Treed Coniferous | 16.77 | 10.26 | 8.03 | 8.53 | 6.62 | 5.16 | 3.43 | 4.20 | 31.32 | 57.60 | 20.40 | - | 2.06 | |
| Subtotal | 12.78 | 9.22 | 7.81 | 8.15 | 6.41 | 4.61 | 3.21 | 4.19 | 31.32 | 57.60 | 20.40 | 4.71 | 1.95 | |
| Boreal Shield | Non-treed | 36.68 | 68.25 | 44.21 | 46.44 | 41.48 | 44.57 | 75.36 | 98.60 | 99.86 | 100.00 | 100.00 | 4.34 | 8.65 |
| Treed Broadleaf | 7.66 | 5.66 | 5.04 | 5.68 | 5.81 | 13.15 | 22.08 | 29.61 | 75.51 | 67.28 | - | - | 2.77 | |
| Treed Mixedwood | 5.78 | 4.18 | 3.81 | 3.75 | 3.89 | 8.43 | 11.63 | 29.59 | 51.61 | 68.50 | 72.89 | - | 1.86 | |
| Treed Coniferous | 5.11 | 3.41 | 3.12 | 2.82 | 2.53 | 4.26 | 3.58 | 9.47 | 17.88 | 30.72 | 58.02 | - | 1.29 | |
| Subtotal | 3.42 | 2.43 | 2.20 | 2.14 | 2.02 | 3.72 | 3.41 | 8.76 | 16.46 | 26.73 | 44.58 | 4.34 | 1.00 | |
| Atlantic Maritime | Non-treed | 68.90 | 69.28 | 52.11 | 55.42 | 99.95 | - | - | - | - | - | - | 7.02 | 6.94 |
| Treed Broadleaf | 17.26 | 10.44 | 9.16 | 8.85 | 10.50 | 19.10 | 41.08 | 76.77 | 99.99 | - | 99.99 | - | 4.69 | |
| Treed Mixedwood | 8.49 | 6.64 | 5.78 | 5.40 | 7.60 | 13.77 | 54.96 | 66.63 | - | 98.67 | - | - | 2.96 | |
| Treed Coniferous | 10.62 | 7.04 | 5.70 | 5.87 | 7.77 | 10.92 | 22.75 | 30.90 | 99.99 | - | - | - | 3.00 | |
| Subtotal | 6.49 | 4.47 | 3.81 | 3.72 | 4.95 | 8.15 | 19.81 | 32.92 | 82.39 | 98.67 | 99.99 | 7.02 | 1.97 | |
| Mixedwood Plains | Non-treed | - | - | - | - | - | - | - | - | - | - | - | 16.44 | 16.44 |
| Treed Coniferous | 33.49 | 14.40 | 14.86 | 15.53 | 20.93 | 46.64 | 60.19 | 91.21 | - | - | - | - | 8.14 | |
| Treed Mixedwood | 26.52 | 16.92 | 10.30 | 16.21 | 20.98 | 33.95 | 45.50 | 63.55 | - | - | - | - | 7.19 | |
| Treed Broadleaf | 20.45 | 11.68 | 9.49 | 8.83 | 11.17 | 26.71 | 41.12 | 57.44 | 99.99 | - | - | - | 5.14 | |
| Subtotal | 15.59 | 8.13 | 6.57 | 7.18 | 9.52 | 20.83 | 32.05 | 41.75 | 99.99 | - | - | 16.44 | 3.84 | |
| Boreal Plains | Non-treed | 32.37 | 42.70 | 27.07 | 23.70 | 44.36 | 91.53 | 86.22 | 75.70 | - | - | - | 8.39 | 13.23 |
| Treed Mixedwood | 13.62 | 9.97 | 10.24 | 6.32 | 7.52 | 9.20 | 11.52 | 16.14 | 23.41 | 44.96 | 99.29 | - | 3.39 | |
| Treed Broadleaf | 10.98 | 7.38 | 7.98 | 5.68 | 6.87 | 9.33 | 16.04 | 31.43 | 59.39 | 100.00 | - | - | 3.16 | |
| Treed Coniferous | 15.29 | 8.77 | 6.21 | 4.57 | 4.96 | 5.89 | 6.95 | 10.05 | 19.26 | 41.80 | 34.72 | - | 2.32 | |
| Subtotal | 7.60 | 4.96 | 4.64 | 3.21 | 3.63 | 4.41 | 5.65 | 8.47 | 16.74 | 38.69 | 34.24 | 8.39 | 1.66 | |
| Prairies | Treed Mixedwood | 56.56 | 40.53 | 51.57 | 46.89 | 69.67 | 93.11 | 100.00 | - | - | - | - | - | 31.93 |
| Non-treed | 41.20 | 75.44 | 84.99 | - | - | - | - | - | - | - | - | 28.44 | 27.31 | |
| Treed Coniferous | 78.12 | 98.26 | 69.73 | 44.05 | 81.41 | 89.27 | 100.00 | 95.95 | - | - | - | - | 40.23 | |
| Treed Broadleaf | 14.73 | 10.89 | 20.02 | 29.17 | 57.46 | 73.55 | - | 100.00 | - | - | - | - | 7.95 | |
| Subtotal | 14.50 | 10.76 | 18.71 | 25.28 | 44.91 | 59.38 | 74.65 | 92.11 | - | - | - | 28.44 | 7.47 | |
| Taiga Cordillera | Non-treed | - | - | 89.20 | 67.08 | 99.60 | - | - | - | - | - | - | 0.00 | 59.59 |
| Treed Broadleaf | 69.37 | 79.38 | 65.97 | 67.58 | 17.15 | 99.99 | - | - | - | - | - | - | 15.97 | |
| Treed Mixedwood | 83.50 | 66.10 | 49.11 | 40.83 | 44.44 | 48.98 | 12.71 | 99.99 | 99.99 | - | - | - | 12.23 | |
| Treed Coniferous | 37.71 | 26.05 | 19.78 | 15.21 | 19.65 | 19.11 | 6.44 | 37.04 | 55.01 | 99.99 | - | - | 5.56 | |
| Subtotal | 46.19 | 23.36 | 18.13 | 14.22 | 14.25 | 18.35 | 6.27 | 36.62 | 48.20 | 99.99 | - | 0.00 | 5.29 | |
| Boreal Cordillera | Non-treed | 100.00 | 45.07 | 42.68 | 42.50 | 28.38 | 28.59 | 56.86 | 100.00 | - | - | - | 46.25 | 15.76 |
| Treed Broadleaf | 44.77 | 28.48 | 21.98 | 24.88 | 18.51 | 29.34 | 56.29 | 73.84 | 43.77 | 100.00 | 67.92 | - | 13.81 | |
| Treed Mixedwood | 30.58 | 18.88 | 25.94 | 26.37 | 17.47 | 15.26 | 21.69 | 23.54 | 51.18 | 75.69 | 51.58 | - | 8.50 | |
| Treed Coniferous | 32.81 | 24.31 | 15.92 | 13.42 | 9.26 | 7.53 | 8.22 | 10.04 | 12.71 | 22.25 | 10.75 | - | 3.57 | |
| Subtotal | 21.30 | 14.72 | 11.77 | 10.81 | 7.36 | 6.63 | 7.81 | 9.21 | 12.29 | 21.41 | 10.50 | 46.25 | 3.17 | |
| Pacific Maritime | Non-treed | - | - | - | - | - | - | - | - | - | - | - | 13.78 | 13.78 |
| Treed Mixedwood | 48.88 | 26.56 | 20.68 | 32.60 | 30.27 | 33.27 | 49.91 | 43.80 | 46.68 | 99.98 | 48.31 | - | 12.79 | |
| Treed Broadleaf | 76.30 | 53.06 | 29.17 | 27.13 | 35.57 | 37.08 | 41.51 | 48.79 | 99.98 | 47.48 | 46.12 | - | 13.51 | |
| Treed Coniferous | 17.96 | 13.35 | 14.81 | 17.33 | 16.50 | 18.95 | 20.28 | 25.11 | 16.38 | 13.96 | 4.80 | - | 3.81 | |
| Subtotal | 17.39 | 12.29 | 12.94 | 14.80 | 14.11 | 15.88 | 18.78 | 22.49 | 16.17 | 13.39 | 4.77 | 13.78 | 3.64 | |
| Montane Cordillera | Non-treed | 89.65 | 100.14 | - | 99.94 | 100.14 | 69.89 | 85.28 | 100.00 | - | 100.00 | - | 7.30 | 7.26 |
| Treed Broadleaf | 46.13 | 25.58 | 24.41 | 20.92 | 16.71 | 22.66 | 18.94 | 26.45 | 55.22 | 70.67 | 62.15 | - | 8.36 | |
| Treed Mixedwood | 49.91 | 19.49 | 24.14 | 16.76 | 13.83 | 21.27 | 13.72 | 17.45 | 24.59 | 39.22 | 26.61 | - | 6.97 | |
| Treed Coniferous | 14.30 | 8.72 | 11.90 | 8.03 | 6.25 | 5.64 | 5.01 | 5.48 | 6.83 | 7.03 | 5.04 | - | 2.16 | |
| Subtotal | 16.59 | 7.69 | 10.13 | 6.89 | 5.40 | 5.40 | 4.63 | 5.17 | 6.70 | 6.91 | 5.02 | 7.30 | 2.01 | |
| Hudson Plains | Non-treed | - | - | 99.99 | 99.99 | 99.99 | 99.99 | - | - | - | - | - | 16.31 | 16.23 |
| Treed Broadleaf | 50.49 | 31.21 | 55.77 | 80.10 | 45.10 | 96.14 | 47.96 | - | - | - | - | - | 30.65 | |
| Treed Mixedwood | 49.66 | 42.90 | 33.13 | 33.17 | 45.47 | 7.40 | 83.55 | 76.49 | - | - | - | - | 7.11 | |
| Treed Coniferous | 33.87 | 13.89 | 10.38 | 12.36 | 17.61 | 12.51 | 8.94 | 22.49 | 65.23 | 99.99 | - | - | 4.90 | |
| Subtotal | 26.57 | 13.33 | 9.92 | 11.65 | 16.29 | 8.43 | 8.90 | 22.36 | 65.23 | 99.99 | - | 16.31 | 4.38 | |
| Canada | Non-treed | 26.42 | 31.98 | 37.41 | 32.84 | 22.36 | 23.41 | 47.82 | 58.07 | 99.86 | 99.59 | 100.00 | 2.76 | 5.50 |
| Treed Broadleaf | 5.43 | 3.61 | 3.48 | 3.34 | 3.38 | 5.54 | 10.68 | 15.62 | 33.89 | 34.20 | 35.27 | - | 1.67 | |
| Treed Mixedwood | 4.46 | 3.12 | 2.93 | 2.71 | 2.96 | 4.16 | 5.04 | 9.19 | 16.40 | 30.54 | 23.69 | - | 1.33 | |
| Treed Coniferous | 4.00 | 2.57 | 2.58 | 2.21 | 1.97 | 1.88 | 1.98 | 2.87 | 5.05 | 5.85 | 3.35 | - | 0.88 | |
| Total | 2.62 | 1.78 | 1.74 | 1.56 | 1.48 | 1.64 | 1.84 | 2.71 | 4.83 | 5.66 | 3.32 | 2.76 | 0.70 | |
| 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. |
||||||||||||||