I pieced together a bunch of clips, because a lot of things were happening and the camera wasn't always focused on 503, so it was hard to tell it was 503 at first. He's the tall guy walking up through the riffles. Once he got up to the falls, he headed for the office. It wasn't until he got into the hole and he did the lip licking thing and turning his head from side to side that I started to wonder if this super tall guy was 503. He also got an official greeting from 32 Chunk, because that's mandatory for new arrivals these days. On his way out, you can see him walk by 856 in the riffles.
From explore.org's Riffles Bear Cam - explore.org/livecams/brown-be... and Brooks Falls Brown Bears Cam - explore.org/livecams/brown-be... at Katmai National Park