… I clicked on the light and stared through the window onto my porch — into the eyes of an adult grizzly licking my barbecue grill three feet away. Startled, the bear dashed away as quickly as I stepped back, but that rush beat the devil out of any cup of coffee.

In my case, I’d been lax on cleaning or locking up attractants, any odors that can attract a hungry bear. A grizzly’s sense of smell is the stuff of legend. They are capable of locating a carcass under water, sniffing out crumbs dropped from your campsite lunch, and chances are, they even know what you had for breakfast as you hike down a trail. My biologist friend, Kate Kendall, a veteran bear researcher, told me that anecdotally, they’ve seen grizzlies sniff out a meal a half mile away.

After my late-night visit, I stopped composting and brought in the bird feeders. When I built a barn for my horses, the grain room was made to be secure from four-inch claws. If I’ve had unwelcome visitors since, R.D. and I must have slept through it.

Despite my changes, bears also don’t forget a good meal. In 1988, a massive grain spill just outside Glacier National Park brought in bears for miles to feed on the rank, fermenting grain. Even after a cleanup, officials, wanting to be good neighbors (and avoid conflict), closed a nearby campground and prohibited stopping on a passing highway for years. Bears remember a food source and can return as long as they live.

— Amy Grisak, Popular Mechanics, July 3, 2020

I was going to add a photo, but then realized that your own imagination would do a much better job of creating an image of a grizzly (which can run through heavy underbrush at up to 35 miles per hour).