Ontario is home to an estimated 85,000 to 105,000 black bears, spread across the province from the southern edge of the Canadian Shield to the Hudson Bay lowlands. If you spend enough time in Ontario's backcountry, you will encounter a bear. That's not a possibility — it's a certainty. The question isn't whether you'll see one, but whether you'll be prepared when you do.
The good news is that black bears are overwhelmingly non-aggressive toward humans. Fatal black bear attacks in Ontario are exceptionally rare. The vast majority of bear encounters end with the bear running away. But bears that have been food-conditioned — that have learned to associate humans with easy meals — are a genuine hazard, and encounters with them follow a different and more dangerous script. Your responsibility as a backcountry traveller is to prevent food conditioning through proper food storage and clean camp practices, and to know how to respond if an encounter happens despite your precautions.
Understanding Black Bear Behaviour
Black bears are intelligent, curious, and primarily motivated by food. An adult black bear needs to consume 15,000 to 20,000 calories per day during the hyperphagia period in late summer and fall, when they're building fat reserves for hibernation. That caloric drive is what brings them into conflict with human campers — your food barrel smells like a buffet to an animal with a sense of smell seven times more acute than a bloodhound's.
Bears are most active at dawn and dusk but can appear at any hour. They're generally solitary except for mothers with cubs. A sow with cubs is not inherently more aggressive than other bears — the stereotype of the "protective mother" is less applicable to black bears than to grizzlies — but she deserves extra caution and space.
In Ontario's backcountry, bear activity follows seasonal food availability. In spring (May-June), bears feed on grasses, sedges, and emerging plants in wetlands and clearings. In summer, berries become the primary food source — look for bears in blueberry patches, raspberry tangles, and along shorelines where serviceberries grow. In fall, bears shift to acorns, beechnuts, and hazelnuts. A poor berry or nut year pushes bears to range farther and increases the likelihood of encounters at campsites.
Food Storage Methods
Proper food storage is the single most important thing you can do to prevent bear problems. A bear that gets human food will return for more, becoming increasingly bold and eventually dangerous. Every time a group leaves food accessible, they're creating a problem bear that someone else will have to deal with — often lethally, since food-conditioned bears that can't be relocated are euthanized.
Bear Hang (PCT Method)
The traditional approach: suspend your food from a tree branch using rope, high enough and far enough from the trunk that a bear can't reach it. The standard recommendation is 3 metres below the branch, 3 metres from the trunk, and at least 6 metres off the ground.
In practice, bear hangs are harder to execute well than they sound. Finding a suitable branch — the right height, the right distance from the trunk, strong enough to hold your food but thin enough that a bear can't climb out on it — is often difficult in Ontario's boreal forest, where many trees are conifers with branches close to the trunk. A poor bear hang is worse than useless: it just makes the bear work harder for a reward, reinforcing the behaviour.
If you hang food, use the PCT (Pacific Crest Trail) method: tie a rock to your rope, throw it over a branch at least 6 metres high, clip your food bag to the rope with a carabiner, raise it to the branch, then tie off the rope so the bag hangs at least 3 metres below the branch and 3 metres from the trunk. Use at least 15 metres of cord.
Bear Canisters
Hard-sided, screw-top canisters (BearVault, Garcia, Counter Assault) are the most reliable portable food storage. Bears cannot open them, cannot crush them, and cannot carry them away. They're heavy and bulky, which is a genuine drawback on portage-intensive trips, but they work. Required in some American wilderness areas and increasingly recommended in Canadian backcountry.
For canoe tripping in Ontario, the 60-litre food barrel (Recreational Barrel Works or similar) with a screw-top lid provides similar protection with more volume. Bears can eventually break into standard barrels by wedging them against rocks and stomping, but it takes time and effort, and many bears won't persist. For areas with known problem bears, a barrel isn't sufficient — you need a proper bear-resistant canister or a hang.
Bear Boxes and Cables
Some designated campsites in high-use Ontario parks (notably Algonquin and Killarney) have bear boxes or bear cables installed at the site. Use them. They exist because bears in those areas have learned to target campsites, and the infrastructure is there to break the cycle. Store all food, garbage, toiletries, and anything with a scent in the bear box overnight and whenever you leave camp.
Clean Camp Practices
Food storage is only part of the equation. A clean camp means eliminating all food-related odours from your sleeping and living areas.
Cook away from your tent. Establish your kitchen at least 50 metres — ideally 100 metres — from your sleeping area. On a typical Ontario campsite, this means cooking on the point or the fire ring area and sleeping set back in the trees. Food odours on your clothing, tent, and sleeping bag attract bears to exactly where you don't want them.
Wash dishes immediately after eating. Don't leave food scraps sitting in pots. Strain dishwater and scatter it in the bush well away from camp — don't dump it in the lake at your campsite. Fish guts should be disposed of in deep water, not left on shore.
Change clothes before bed. The shirt you cooked dinner in smells like food. Sleep in clean clothes and store cooking clothes with your food.
Store all scented items with your food. Toothpaste, sunscreen, lip balm, soap, and insect repellent all have odours that attract bears. If it has a smell, it goes in the food storage, not in your tent.
Never eat in your tent. This seems obvious, but it happens — especially in rain. A granola bar eaten in your tent at 10 PM leaves crumbs and odour that a bear can detect. If it's raining, eat under a tarp rigged over the kitchen area.
What to Do During a Bear Encounter
On the Trail or in the Water
Most trail encounters are over in seconds. The bear sees or hears you, startles, and runs. If the bear doesn't immediately flee:
Stop and assess. Don't run. Running triggers a chase instinct. Stand still, identify yourself as human by speaking in a calm, firm voice ("Hey bear, I'm here, I'm moving on"), and assess the bear's behaviour.
Make yourself large. Stand tall. If you're in a group, stand close together. Raise your arms or your paddle. You want to look big, not threatening — you're communicating that you're not prey and not worth the trouble.
Back away slowly. Give the bear an escape route. If you're on a narrow trail, step off the trail to the side so the bear can pass. Don't corner it. Don't approach it. Don't stare it down — direct eye contact can be perceived as a threat.
If the bear approaches: Stand your ground. Speak firmly. Bang pots together. Use a whistle. Most black bears that approach are curious or testing you, not attacking. If you stand your ground and make noise, the vast majority will back off.
In Camp
A bear in camp is usually after food. Make noise — bang pots, shout, blow a whistle. Most camp bears will leave if you're loud and assertive. If the bear has gotten into food, don't try to take it back. Let it have what it has and focus on securing the rest. No meal is worth a confrontation.
Defensive vs Predatory Encounters
This distinction is critical and applies differently to black bears than to grizzlies.
A defensive bear encounter — where the bear was surprised at close range, is protecting cubs, or is protecting a food source — typically involves huffing, jaw-popping, bluff charges, and swatting the ground. The bear is scared and wants you to go away. Back away slowly and leave the area.
A predatory encounter — where a bear is silently following you, circling your camp, or approaching you directly without defensive posturing — is far more dangerous and far less common. A bear exhibiting predatory behaviour sees you as prey. In this situation, do NOT play dead (that advice applies to grizzly bears in defensive encounters). With a predatory black bear, you fight back. Yell, throw rocks, use your paddle, use bear spray, use whatever you have. Make it clear that you are not an easy target. This is the one scenario where aggression is the correct response.
Bear Spray
Bear spray — concentrated capsaicin in a pressurized canister — is legal in Ontario and available at most outdoor retailers. It is the single most effective tool for stopping a bear charge at close range. Studies consistently show that bear spray is more effective than firearms at preventing injury during bear encounters.
Carry bear spray in a hip holster or chest holster where you can reach it in two seconds. Practice drawing and deploying it (without actually spraying) so the motion is automatic. In an encounter, aim slightly downward and spray in a sweeping motion when the bear is 5 to 8 metres away. The spray creates a cloud that the bear runs through, affecting its eyes, nose, and lungs.
Bear spray canisters have expiration dates — check yours before each season. Store it at moderate temperatures; extreme heat (inside a car in summer) can cause canisters to leak or burst. In camp, keep it in your tent within arm's reach at night.
Bear spray is not a substitute for proper food storage and clean camp practices. It's a last resort for an encounter that's gone wrong, not a license to be careless with food.
For more information on bear behaviour and prevention, visit the Ontario government's bear encounter prevention page and review the Bear Wise program.