Hiker and his Cat

While eating our burgers on the patio outside a burger shop, we were treated to this passerby and his 9 month old cat "Umm".
He has hiked across the USA five times he told us and is on his way back to the North Carolina for his sixth crossing.
As to his young cat's name he says, "I was asked soon after I got him what his name is.  I said, 'Ummmm' and it stuck."