Grizzly Bear Attacks in the USA

Grizzly Bear Attacks in the USA Risk Calculator

Grizzly bear attacks in the USA are rare but serious incidents that occur primarily in wilderness areas where grizzly bears (Ursus arctos) inhabit, such as Alaska, Montana, Wyoming, and Idaho. This risk calculator estimates your likelihood of experiencing a grizzly bear attack based on location, activity, season, and precautionary measures. By selecting your planned activities and precautions, you can assess your risk and learn how to stay safe in bear country.

Your Inputs

Select the options that best describe your situation to estimate your risk of a grizzly bear attack.

[{"location":"Alaska","location_odds_ratio":"3.0"},{"location":"Yellowstone National Park","location_odds_ratio":"0.4"},{"location":"Glacier National Park","location_odds_ratio":"1.0"},{"location":"Other Lower 48 States","location_odds_ratio":"0.5"},{"location":"Non-Grizzly Area","location_odds_ratio":"0.0"}]

[{"activity":"Hiking\/Camping","activity_odds_ratio":"1.0"},{"activity":"Hunting","activity_odds_ratio":"2.0"},{"activity":"Working Outdoors","activity_odds_ratio":"1.0"},{"activity":"Other Activities","activity_odds_ratio":"0.5"}]

[{"season":"Summer","season_percentage_attacks":"48","season_months":"3"},{"season":"Other Active Months","season_percentage_attacks":"52","season_months":"6"},{"season":"Hibernation Season","season_percentage_attacks":"0","season_months":"3"}]

[{"precautions":"Bear Spray and Food Storage","precautions_risk_reduction":"0.02"},{"precautions":"Bear Spray Only","precautions_risk_reduction":"0.08"},{"precautions":"Food Storage Only","precautions_risk_reduction":"0.5"},{"precautions":"No Precautions","precautions_risk_reduction":"1.0"}]