Grizzly Bear: Facts, Habitat, Behavior, and Survival Guide

Few animals make you check your footing quite like a grizzly bear. This brown bear subspecies, named for the silver-tipped “grizzled” fur across its shoulders, is mid-comeback in the Northern Rockies, changing how hikers, ranchers, and park managers share the land — and the profile below is built from Parks Canada field guides and federal census data.

Scientific Name: Ursus arctos horribilis · Average Weight (Male): 400–790 lbs (180–360 kg) · Top Speed: 35 mph · Lifespan (Wild): 20–25 years · Conservation Status: Threatened (US) / Special Concern (Canada)

Ten numbers, one pattern: the size figures everyone quotes are only half the story — the other half is how much room the species actually has left.

The picture that emerges: a species with headline-grabbing size and speed, but a conservation margin measured in a single-digit percentage of protected range.

What are some interesting facts about grizzly bears?

The grizzly’s reputation is built on a handful of physical details that make it distinct among North American wildlife — and those details come in handy the moment you step into bear country.

Why is it called grizzly?

• The name comes from the silver-tipped “grizzled” fur that gives the coat a frosted look — though Parks Canada is blunt about its limits: grizzlies range from blonde to nearly black, so color alone is unreliable (Parks Canada, Thaıdene Nëné National Park Reserve).
• The shoulder hump is a solid mass of muscle and the most reliable marker for telling a grizzly from a black bear (Parks Canada, Yoho National Park).

The upshot: “grizzly” describes the fur, but the hump is the feature that keeps you safe.

How fast can a grizzly bear run?

• A grizzly can sprint at roughly 30–35 mph (48–56 km/h) over short distances — faster than most people can ride a bike on a forest trail.
• That speed is why the first rule of an encounter is the hardest to follow: do not run.

There is no reliable escape on foot. That is why the standard tool in bear country is bear spray, not running shoes.

What is a grizzly bear’s scientific name?

• Ursus arctos horribilis — a subspecies of the brown bear — is the full binomial, with a subspecies name that translates roughly to “horrible” or “fearsome.”
• In Canada, that subspecies lives in British Columbia, Alberta, Yukon, Northwest Territories, and Nunavut (COSEWIC, Government of Canada).

What is the size and weight of a grizzly bear?

Adult males run roughly twice the weight of adult females, and the gap shapes everything from diet to denning to how quickly the population can grow.

Grizzly bear weight

• Adult males: approximately 180–360 kg (400–790 lb) (Parks Canada, Thaıdene Nëné National Park Reserve).
• Adult females: approximately 130–180 kg (290–400 lb) (Parks Canada, Thaıdene Nëné National Park Reserve).
• A separate Parks Canada profile puts average weights at about 250 kg for males and 150 kg for females — the spread reflects seasonal fat and regional food supply (Parks Canada, Kluane National Park and Reserve).

That seasonal swing is not cosmetic: a grizzly can pack on a large share of its winter fat in a few months of late-summer feeding.

Grizzly bear height

• On hind legs, an adult grizzly can reach about 8 feet (2.4 m) — roughly basketball-rim height.
• At the shoulder, the hump adds visible power and is the definitive silhouette difference from a black bear (Parks Canada, Yoho National Park).

The 8-foot figure is the one that gets photos taken — and the one that should remind you why binoculars belong in a bear-country daypack.

Grizzly bear size

• Front claws can reach 4 inches (10 cm) — long, straight, and built for digging roots and dens.
• In profile, the head looks large, with short rounded ears and a concave or scooped face — the opposite of the black bear’s straighter lines (Parks Canada, Thaıdene Nëné National Park Reserve).

The implication: size alone, especially at a distance, is the least reliable clue. The hump and the face settle it.

Where do bears go to hibernate?

Hibernation is less a long sleep and more a metabolic shutdown, and where a grizzly chooses to dig in says a lot about the landscape it lives in.

When do grizzly bears hibernate?

• Hibernation typically runs 5–7 months, from late fall into spring.
• Inside the den, heart rate drops from roughly 40 to 8 beats per minute.

That drop is the difference between a sleeping mammal and a bear in true winter shutdown.

What do grizzly bears eat before hibernation?

• In late summer and fall, grizzlies enter hyperphagia — eating up to 20,000 calories a day to build the fat reserves that carry them through winter.
• The menu is omnivorous and regional: coastal rainforests, mountain environments, boreal areas, and even Arctic tundra all feed grizzlies (Parks Canada, Yoho National Park).
• Dens are dug on steep slopes or under large tree roots, where snow cover adds insulation.

Why this matters: hyperphagia is also when bears are most food-focused, which is exactly when a sloppy campsite becomes a problem.

What is a grizzly bear’s worst enemy?

For an adult grizzly, the list of natural predators is effectively zero. The list of human-caused threats is not.

What smells do bears absolutely hate?

• Bears strongly dislike the scent of ammonia and bleach, which is why those smells occasionally show up as campsite deterrents — though they are not recommended for personal defense.
• The stronger rule: don’t give a bear a reason to associate humans with food. Storage discipline beats any repellent.

The trade-off: chemical smells may keep a bear out of a campsite, but they are no substitute for hanging food and keeping a clean camp.

What is a bear’s biggest fear?

• Adult grizzlies have no natural predators; cubs are the exception and can be killed by wolves, mountain lions, and other bears.
• The dominant threat to adult grizzlies is human activity — habitat loss, hunting, and the slow fragmentation of wild corridors.

The catch: a species that fears nothing in nature but is sensitive to nearly everything human is precisely the kind that needs legal protection — which is why COSEWIC lists Canadian grizzlies as Special Concern (Parks Canada, mountain parks bear guide).

Should you run if a bear is chasing you?

No. Running is the one move that removes all ambiguity about whether the bear should treat you as prey.

Which bear do you not play dead?

• Do not play dead with a black bear — fight back aggressively with anything available.
• Play dead only during a defensive grizzly attack: lie flat on your stomach, legs spread, hands locked behind your neck.

The reason the advice flips is biology: black bear attacks are usually predatory; grizzly attacks are usually defensive.

What happens if you punch a grizzly bear?

• A punch will not stop a charging grizzly. The effective tool is bear spray, which is rated above firearms for stopping charges.

The math is blunt: a 360 kg animal moving at 56 km/h does not register a punch. It does register capsicum spray in the eyes and nose — which is exactly what the canister is for.

Will a bear run away if you scream?

• Loud, confident noise at a distance can deter a bear; screaming up close can provoke the opposite reaction.

The distinction is distance and tone: a firm voice signals “human, not prey”; a shriek changes the signal a bear is reading.

What part of a human does a bear eat first?

• Predatory attacks are rare — and in that scenario the advice is explicit: do not play dead. Fight with anything you have, including bear spray, rocks, or a knife.
• The overwhelming majority of grizzly encounters are defensive, and defensive attacks end when the bear decides the threat is gone.

The implication: survival depends less on memorizing one trick and more on reading which kind of attack you are facing.

The implication: your response in an encounter must match the species and the context or the outcome changes completely.

Where can you see grizzly bears in Canada?

Canada holds most of the continent’s remaining grizzlies, but viewing is not a zoo experience — it is a privilege earned with binoculars, patience, and a licensed guide.

Grizzly bear Banff

• Banff and Jasper National Parks in Alberta are the classic viewing destinations — and the busiest, which makes responsible viewing rules non-negotiable.
• Alberta’s grizzly population is estimated at about 1,000 bears, and the province designates the species as threatened (COSEWIC, Government of Canada; Parks Canada, mountain parks bear guide).

If you are sketching a mountain itinerary this year, the Mt Dandenong Visitor Guide: Things to Do, Hikes & Hotels shows how to layer trail choices, weather windows, and safety checks into one day out.

Alberta grizzly bear population map

• Across Canada, grizzlies occupy roughly 2,574,000 km² — about 26% of the country — spanning mountain, boreal, and tundra country (COSEWIC, Government of Canada).
• Of that range, only about 8.3% is protected (same assessment).
• At the eastern edge, grizzlies may occur occasionally in Manitoba’s Churchill region, probably dispersing from adjacent Nunavut (Government of British Columbia, grizzly bear safety guide).

What this means: a grizzly range map is a picture of a species that still has room — but not much protected room.

What is a grizzly bear tour?

• A licensed grizzly tour pairs visitors with guides who handle the safety logistics — bear awareness, safe distance, and reading behavior.
• The Khutzeymateen Grizzly Bear Sanctuary in British Columbia is a premier destination for low-impact bear viewing.

For first-time visitors, the tour is not a luxury; it is the practical difference between a safe sighting and a guess.

Grizzly Bear vs Black Bear: Field Identification

Six markers, one pattern: the hump and the face settle it every time — color is the tie-breaker you should ignore.

The takeaway: if you see a hump and a scooped face, it is a grizzly. If you see a straight profile and no hump, it is a black bear. Color tells you almost nothing.

Grizzly Bear Spec Sheet

Twelve specs, one pattern: every eyebrow-raising figure — 360 kg, 35 mph, 8 feet — comes attached to a habitat caveat.

The pattern: the grizzly is a species of extremes, and each extreme is tied to survival in a cold, seasonal world.

How to Handle a Grizzly Bear Encounter: Step by Step

The following protocol condenses the standard guidance into an order of operations — not a menu.

1. Stay calm and stop. A grizzly that knows you are there usually leaves on its own.
2. Do not run. Running triggers the chase instinct, and a grizzly can sprint at 35 mph.
3. Speak in a low, firm voice. Confident noise at a distance deters; screaming can provoke.
4. If the bear charges defensively, play dead. Lie flat, cover your neck, and stay still until the bear leaves.
5. If the attack is predatory, fight back. Use bear spray, rocks, or any weapon; do not play dead.

Why this order matters: most encounters resolve at step one or two, so the early steps make the last two unnecessary in most cases. The same preparation-first logic runs through our Mount Fuji: Facts, Eruption History, and Climbing Guide — route knowledge and the right gear decide most outcomes in the mountains.

Grizzly Bear Recovery Timeline

A short timeline shows how a species pushed to the edge in the 1800s became a managed recovery story — and why the next chapter is still unwritten.

• c. 50,000 years ago — Grizzlies evolve in North America during the last Ice Age.
• 1800s — Settlement-era hunting drives the population from an estimated 50,000 to near extirpation in the contiguous United States.
• 1975 — Yellowstone grizzlies are listed as Threatened under the U.S. Endangered Species Act.
• 2024–2025 — COSEWIC estimates Canada’s population at roughly 26,916–34,150, with British Columbia at 14,000+ and Alberta at about 1,000 (COSEWIC, Government of Canada; COSEWIC Chapter 6, Government of Canada).

The catch: recovery has been real but uneven, and the 8.3% protected-range figure is the ceiling on how much of that recovery is durable.

Grizzly Bear Facts: Confirmed vs Still Unclear

Public knowledge about grizzlies mixes solid field science with internet lore. Here is the split.

The line between confirmed and unclear matters for one practical reason: every myth a hiker sheds is a bear encounter that ends peacefully instead of badly.

What the Experts Say

The institutional voices in this story — Parks Canada, COSEWIC, and provincial wildlife offices — converge on the same core advice.

“The shoulder hump is a mass of powerful muscle and is a principal feature distinguishing grizzly bears from black bears.”

— Parks Canada, Yoho National Park bear ecology guide

On the identification question, the agency is unambiguous.

“Colour alone is unreliable, because grizzlies range from blonde to nearly black.”

— Parks Canada, Thaıdene Nëné National Park Reserve identification guide

The scale of the Canadian range is the part most people miss.

“Grizzly bears occur in parts of British Columbia, Alberta, Yukon, Northwest Territories, and Nunavut.”

— Government of Canada, COSEWIC status assessment

Even provincial guides now account for a shifting range.

“Grizzly bears may occur occasionally in Manitoba’s Churchill region, probably dispersing from adjacent Nunavut.”

— Government of British Columbia, Grizzly bear safety guide

The common thread: each institution frames grizzly safety as an identification and planning problem, not a weapon problem.

The Grizzly Bear Takeaway

The grizzly bear is no longer just a predator profile; it is a conservation scorecard. Canada’s national estimate of 26,916–34,150 bears and a protected range of just 8.3% mean the recovery is real but fragile. For Banff-bound hikers and the park managers behind them, the decision is clear: treat every sighting as a privilege, carry bear spray, and respect the distance — or watch a species that clawed its way back lose ground in the very parks where its recovery became news.

Frequently asked questions

If you take one thing from this guide, let it be this: grizzly safety is a knowledge problem, and the knowledge fits in a daypack.