I found this in the Santa Cruz mountains while hiking, specifically in the redwoods. It was at the very top of the mountain. I'm pretty tall, about 5'9", and this bone reaches from the inside of my elbow to the inside of my wrist. I don't have a tape measurer or ruler but I'm going to guess it's about 8.5 inches long, 3 inches at its widest point and about 1.5 inches in depth. There is no hole at the bottom that would suggest canine or feline, but it's too tall and thin to be a pig. I'm stumped.