A Reddit thread made the rounds this week — a hunter posts a trail cam photo of a black bear and asks the simple question: how much does this bear weigh? The responses ranged from 180 pounds to 400 pounds, all from the same image. That kind of spread isn’t just internet noise. That’s the difference between a shooter and a cub at distance in the timber, and with Montana’s spring black bear season opening April 15, you’ve got one week to get this skill dialed in before it matters for real.

Why Spring Bear Judging Is Harder Than It Looks

Spring bears come out of their dens looking rough. A big boar that weighed 350 pounds going into hibernation in October might step out into the melting snow on the Cabinet Mountains or along the Blackfoot River corridor looking gaunt, saggy-hided, and smaller than he actually is. Meanwhile, a fat sow — or worse, a young bear still running with its mother — can puff up and look substantial if you’re glassing from 200 yards in low light. The post-denning coat is thick and shaggy, which distorts body lines. Don’t let the fur fool you.

The Four Proportions That Actually Tell You Something

1. Leg Length vs. Body Depth

This is the single most reliable indicator in the field. On a mature, heavy bear — think a boar in the 250-plus-pound class — the legs look almost comically short relative to the depth of the body. The belly hangs low, the chest is massive, and the animal looks like it’s riding low to the ground. A young bear or a small sow will look leggy by comparison, with visible daylight under the body when standing broadside. If the legs look long and the body looks shallow, you’re looking at a smaller animal. Simple as that.

2. Ear Spacing and Head Shape

Glass the head hard before you do anything else. On a big, mature boar, the ears look small and set wide apart — almost like they got pushed to the sides of the skull as the head grew around them. On a young bear or a sow, the ears look large, round, and prominent, sitting high and close together on top of the skull. A big head with small-looking ears is one of the clearest signs you’re looking at a mature animal. If those ears look like a black lab’s ears — perky, obvious, and dominant — that bear probably isn’t what you’re looking for.

3. The Belly Line and Sway

A heavy spring boar will often show a slight sway in the back and a belly that swings when he walks, even after emerging lean from a den. Watch the animal move if you can. Big bears are deliberate — they roll their shoulders and carry their weight like they own the drainage. Young bears fidget and scramble. A young bear moves quicker, more upright, almost bouncy. That difference in body language is something you’ll recognize immediately once you’ve seen it a few times.

4. Face Shape: Roman Nose vs. Dish Face

Mature bears develop a broader, more Roman-nosed facial profile. Young bears and sows tend to have a shorter, more concave face that looks almost dish-shaped — some folks even say cute. When you’re glassing a bear on a south-facing slope above Lincoln or working the drainages off Highway 200 toward Ovando, take the time to get a clear look at the face before the animal moves into the timber. In my experience, hunters who rush past this step are the ones who end up regretting it.

Montana-Specific: Know Your Grizzly Situation

This cannot be overstated. If you’re bear hunting in northwestern Montana — the Swan Valley, the South Fork of the Flathead, the Rocky Mountain Front east of Choteau and Augusta — you are hunting in occupied grizzly bear range. Grizzlies are not legal to hunt in Montana. Before you pull up on any bear, confirm the species. Grizzlies have a pronounced shoulder hump, a dished facial profile, short rounded ears, and a more golden or frosted coat coloration — though black-phase grizzlies do exist. A black bear will lack the shoulder hump and will have a straighter back profile and a more pointed face. If there is any doubt, there is no doubt. Let the animal walk.

FWP Rules You Need to Know Before April 15

Montana Fish, Wildlife & Parks requires that hunters not harvest sows with cubs. In spring, if you see a bear being followed by smaller bears — or if smaller bears appear anywhere in the vicinity — back off completely. Cubs of the year are small, sometimes shockingly small, and a sow can be large enough to be mistaken for a shooter if you’re not methodical. Glass an area for a full five to ten minutes before you make any decision. Honestly, most of the mistakes I’ve heard about from other hunters came down to someone being in too much of a hurry. The FWP regulations also require that harvested bears be presented for inspection within 48 hours at a designated check station — confirm your specific district requirements at fwp.mt.gov before you head out.

What to Do This Week Before the Season Opens

Study reference photos first — find side-by-side comparison images of mature boars, sows, and cubs and burn those proportions into your memory before you’re glassing a real animal with a decision to make. Get out and scout your area now, too. South-facing slopes along river corridors like the Clark Fork, the Bitterroot, and the North Fork of the Blackfoot are warming up fast, and bears are already moving to low-elevation green-up before pushing higher.

• Check your optics — spring bear hunting often means glassing in low light at dawn and dusk. Make sure your binoculars and spotting scope are up to the task.
• Review FWP regulations for your specific hunting district and carry your license and regulations in the field.

One more thing that isn’t optional: tell someone where you’re going. You’re likely in grizzly country. Bear spray, a communication device, and a trip plan go with you every time, no exceptions.

The Reddit crowd couldn’t agree on that bear’s weight — and that’s exactly the point. Field judging is a skill built over time and repetition. But these fundamentals give you a framework to work from, and a week of study before April 15 is better than standing on a hillside guessing.