I paddled over to Thornton Creek Hatchery a couple of days ago and saw a school of salmon coming into the creek as the start of the spawn. I hear there are also bears starting to visit the area.
Because these are wild animals, please have a look at this information video from Bear Aware. There have been visitors to the creek approaching too close to the bear. Though there has not yet been an incident, some caution is necessary in order to keep this fabulous viewing site accessable to the public.