What is a Bigfoot foot like? Well, we can make some very basic assumptions. For one, since they go barefoot, the souls must be very keratinized and tough.
These feet (above) belong to an indigenous person who has never worn shoes. Without boxing the feet into shoes at a young age and throughout life, the foot has splayed wide in the upper foot. This makes balancing the weight over the ground easier.
The foot also must be flexible to conform to stepping on stones, limbs, and other. This limber foot is likely to create a most interesting print compared to us high-arched humans in hard-soled shoes. Imagine a stiff sole atop a pile of pebbles pushing off-making contact with just the edges of the pebbles that meet the hard flat sole. Now, imagine pushing off of pebbles with a pliable foot in which every surface of the exposed rocks meets the foot. The large area surface of the foot and rock combo for push off is a different process to the tiny surface area of the sole meeting the sharp points of rocks only. It would also develop a very bulky leg and hip musculature.
The big toe is splayed away from the other toes. This is once again for balance and weight distribution and also to help the foot conform to all the shapes on the ground with an almost gripping quality. As well, you will find a life-long barefoot is going to develop a tough callused protrusion in the ball of the foot from that very conforming of the foot to what it steps upon.
Karl Sup and I put together a hypothesis on Bigfoot locomotion that involves a horizontally dynamic foot versus a vertically dynamic one like we have. Our foot pushes off on the ball of the foot, a fragile way to step for a being who ways several times our weight a much more musculature. But, a horizontally dynamic foot allows the foot to slide and shift with walking, distributing an taking the load of the heavy weight and also creating a non-bobbing head which is indicative of true Bigfoot video captures. Think in terms of speed skater or cross-country skier.
The paper on our theory is HERE.