This weekend was my first time out elk scouting for 2016. A friend and I hiked into a promising area at around 9,000' and while inspecting a soggy bench with a wallow, a large black bear charged down the hill and stopped 50 yards away. We assumed he(?) was just curious so we stood our ground and waited for him to wander off. We had been talking and generally making noise so I'm convinced he knew we were coming and wasn't completely surprised or caught off guard.
He proceeded to pop his teeth, huff, growl, woof - you name it - for a couple of minutes. We put our packs over our heads, yelled and generally tried to act big, but the bear wouldn't retreat. It eventually bluff charged to within around 30 yards before we slowly backed off. He followed for maybe another 20-30 yards before stopping and I assume just watching us slip away.
Question for those with lots of bear experience: was this likely just due to the bear rut and them being generally more wound up and ornery? Could it have been that he had a sow up the hill that he wanted to keep us away from? I assume a sow with cubs would have just rounded up the kids and taken them away from danger. How do you assess their vocalizations/body language and know when they're truly angry versus just uncomfortable? I believe we did the right thing by standing our ground until he bluff charged, but this is my first bear standoff and I'd like to learn from it.