I first noticed the long slide track where it had slid about 6 metres down the valley slope toward the creek. I then notices tracks where one or two otters had run across the creek bank and down to the water. Unfortunately the tracks were about a day old, so not sharp. Nonetheless i could see the track was a bounding pattern with feet landing together, and prints were larger than a mink track. I thought bounds were mostly about 2 feet but saw one which was about a metre in length.
Other photos show the bound at the start of the long slide, a short slide leading onto the ice (There was open water just beyond the area shown in the photo, a bound track with my binoculars for a size comparison (They are 6 inches in length).
Scat - clearly very shellfish/fish heavy in contents, deposited on a small boulder along the shoreline