"We almost drowned, the river was deep," Livejournal user Dmitry wrote. "We got out, and the bears noticed us all at once."
Some left, some mused silently and others still were frozen in shock. "It's as if they were saying, 'What is this next to us?' or 'What should I do now?'" Dmitry recalled.
Taking their cue from the bears, who all remained calm, the two men continued on their way, snapping photos of their newfound companions as they went.
Here are some of their best shots: