Mysterious Sibley Stone Circles

Nice day hiking the Sibley Volcanic Reserve to check out the stone circles. There are two separate locations with the mysterious stone circles. Ancient Aliens??? I'm not going to rule it out.

Overlooking the stone circles at the top of the hike.

Closer view of the circles.

View down the trail.

Heading up to the second set of circles.

Overlooking the other circle.

Close up view of the rock piles making up the circle. The work of Big Foot? Not ruling it out.

Up and over the last hill on the trail.

View from the top.

Encountered a little rattler on the last part of the trail and stopped to let him cross.