One day in August 1965, while backpacking in the vicinity of California's Minaret Mountains, retired physician Dr Robert W. Denton from Bishop, California, assisted a Mexican farm worker in hauling his mule out of a muddy bog at Hemlock Crossing near the bank of the San Joaquin River, and as the mule struggled free its flailing hooves uncovered a large bowl-shaped object in the mud. When Denton examined it, he found that it was a calvarium - the top and rear portion of a skull - which looked humanoid, but unusual in shape and size.

I've been to Hemlock Crossing on the North Fork of the San Joaquin a number of times, and it is a very remote area.  To read more, click here.