Liard River Floodplain., Hilary Cooke
Liard River Floodplain. © Hilary Cooke

Boreal

Canada's boreal is one of the most important areas of intact forest and wetlands left in the world.  

Boreal forests and wetlands wrap across Canada’s central and northern expanses like a green blanket, and represent one of the most important areas of intact forest and wetlands left in the world.

Why Canada's boreal matters

Canada's boreal forest is the second biggest expanse of continuous intact forests on Earth.

Diverse ecosystems

This massive area contains the third-largest wetland in the world, the Hudson Bay Lowlands. Starting about 300km north of Thunder Bay, and stretching all the way to the shores of Hudson and James Bay, Ontario's northern boreal has seen little of the industrial resource development and urban settlement that has transformed areas to the south.

Peatlands comprise 12% of Canada’s land area, with almost all of this area located in boreal ecosystems. Peatlands are known to store a huge amount of carbon through the accumulation of thick organic soil layers. A significant block of intact forest and peatlands is located in Ontario and Québec, almost entirely within areas not currently allocated for forestry.

Running from northern British Columbia into southern Yukon, the Northern Boreal Mountains area is a magnificent rugged and remote region with remarkably diverse ecosystems, including pristine lakes, grasslands, and boreal and subalpine forests. Valley bottoms provide the richest and most productive habitats, and include lakes, wetlands, and forests of lodgepole pine and white spruce. These valleys also have ecologically valuable pockets of old-growth forest especially along gravel-bed river floodplains.

Home to people

The boreal of northern Ontario is a homeland for Anishnaabeg and Ininiw; many of whom currently live in 31 remote communities established under Treaty No. 9.

The Yukon, Taku, Stikine, and Alsek Rivers support Pacific salmon runs that sustain river otters, bald eagles, and humans, including some of the 14 First Nations whose Traditional Territories lie in this approximately 419,000 km2 region.

Home to wildlife

The boreal of northern Ontario offer an important refuge in the province for wildlife such as caribou and wolverine, because they can find the kind of undisturbed forests that they need for survival.

The northern boreal mountains boast some of the last remaining intact wildlife communities in North America. Here, forest and mountain predators like gray wolf, wolverine, Canada lynx, and grizzly bear have room to roam, while their prey populations abound, including mountain caribou, thinhorn sheep, moose, elk, wood bison, mountain goat, beavers, and snowshoe hare. Northern Boreal Mountain lakes provide critical refuelling stops for waterfowl and shorebirds migrating to and from nesting grounds in the Arctic, and songbirds that winter as far away as South America breed in the region’s lowland forests and wetlands.

Challenges

Mining in the Ring of Fire

  • There is growing interest in driving resource development in this globally unique region, particularly to exploit the Ring of Fire, a mineral-rich crescent about 400 km northeast of Thunder Bay. Extracting ore from the Ring of Fire will require building roads and transmission lines through areas that are currently wild forests, lakes, and wetlands, and crossing dozens of rivers and streams.

Fragmentation

  • Punching roads and utility corridors through intact areas will lead to a cascading series of ecological and social impacts. We know that roads lead to more roads, and more activity in the forest, from mineral exploration to motorized recreation. For caribou and other wildlife, more roads also mean more access for predators, and more threats from humans, a recipe that has led to the disappearance of these animals in areas further south. Habitat changes brought about by forestry and mining will also affect wildlife survival.

Climate change

  • Climate change is happening fastest at northern latitudes, meaning wildlife are already seeing disruption ranging from more intense fires to warmer waters.

Our solutions

Holistic planning

  • To protect the integrity of this globally important area, we need to look at the big picture of how and where to accommodate resource development while sustaining the wild character of the region.
  • We are advocating approaches such as Regional Strategic Assessments that can be used to better understand the combined impact of roads, forestry, mines, and climate change on the region before we make decisions about individual development projects.

Working with Indigenous communities

  • We're developing knowledge by supporting community-based monitoring programs and co-developing research studies.
  • We're engaging governments and First Nations in proactive planning to protect key areas and critical habitats to ensure wildlife populations remain healthy, particularly in the face of a changing climate.

Innovative science for better policy

  • Because of the vast size of northern Ontario – the far northern part of the province is as far from Toronto as Florida, and is only accessible by air or winter ice roads – we have developed innovative approaches to everything from tracking wolverines to assessing the potential impacts of climate change on fish, so that we can create a more informed picture of what is at stake before development decisions are made.
  • Across the Boreal Mountains of the Yukon, we used novel computer modelling tools developed by the BEACONs project to identify large, intact areas that can accommodate natural disturbance regimes, key wildlife habitats, ecosystem representation, and watershed connectivity, providing the “ecological benchmarks” to frame land protection.
  • In southern Yukon, we have tracked otters over ice and land to map critical pathways for protection across the landscape.In the Tintina Trench migratory flyway, we are tracking birds to identify critical sites and habitats in need of protection.
  • In the mountainous Muskwa-Kechika area of northern BC, we are doing field research to help identify key habitats and wildlife populations to enhance previous conservation-based land-use planning in order to better protect the region’s wild character in the face of increased oil-and-gas development.

Wildlife

Programs and initiatives

Projects

Identifying key wolverine habitat

Identifying key wolverine habitat

We're surveying wolverine populations in northern Ontario to create a clearer picture of where wolverine are – and aren’t.

Ring of Fire

Ring of Fire

More than minerals at stake

Learning from Lake Sturgeon

Learning from Lake Sturgeon

Big fish need healthy rivers.

Yukon Climate Change

Yukon Climate Change

Why we need to plan for a changing climate and landscape

Synthesis of peatland knowledge in the Hudson Bay Lowland

Synthesis of peatland knowledge in the Hudson Bay Lowland

Synthesizing peatland research to understand how this region will respond to climate change and development

Resources

See more

Stories and op-eds

Demystifying the Mitigation Hierarchy
2026-04-09

Demystifying the Mitigation Hierarchy

A practical guide to one of the most important, yet misunderstood, frameworks in conservation and development decision making.
Justina Ray, Ciara Raudsepp-Hearne
Women in conservation: Finding balance, voice, and impact
2026-03-05

Women in conservation: Finding balance, voice, and impact

To mark International Women's Day, we sat down with Chrystal Mantyka-Pringle, Co-Director of our Northern Boreal Mountains program to talk about her career to date and what's kept her in the sector.
Chrystal Mantyka-Pringle
See more

Media coverage

Protecting landscapes now that will matter for the future

As part of the Yukon South Beringia Priority Place Initiative, Chrystal Mantyka-Pringle at the WCS Canada helped map the current and future ranges of 66 important plant species in the southern regions of Beringia.
2026-05-11 | Canada's National Observer

Yukon doesn’t need species at risk legislation, environment minister says

Hilary Cooke, a conservation ecologist with Wildlife Conservation Society Canada says more needs to be done for species at risk in the Yukon, even without any new legislation.
2026-05-08 | CBC News

Scientist advises against rushing Ring of Fire road projects

The Ontario government wants to go fast on connecting the Ring of Fire to the highway system, but conservation scientist Adam Kirkwood cautions that haste carries risk.
2026-04-20 | Penticton Herald
See more

Our team

Justina Ray
Justina Ray
President & Senior Scientist
Chrystal Mantyka-Pringle
Chrystal Mantyka-Pringle
Co-Director, Northern Boreal Mountains Program
Hilary Cooke
Hilary Cooke
Co-Director, Northern Boreal Mountains Program
Rachel Anderson
Rachel Anderson
Research Assistant
Christopher Addison
Christopher Addison
Indigenous-led Conservation Specialist
Constance O'Connor
Constance O'Connor
Director, Ontario Northern Boreal Program
Claire Farrell
Claire Farrell
Senior Conservation Program Manager
Victoria Goodday
Victoria Goodday
Public Policy Specialist
See more

Press releases

National Peatland Strategy proposed to protect climate-critical ecosystems amid extraction and industrial development rush
2025-12-04

National Peatland Strategy proposed to protect climate-critical ecosystems amid extraction and industrial development rush

WCS Canada has today unveiled a proposed National Peatland Strategy, calling on federal, provincial, and territorial governments to adopt urgent measures to safeguard Canada’s most carbon-rich ecosystems.
See more

Our team

See more