Female snake (we think) was there first. Then joined 30 min later by smaller male snake. Appear to be mating.
Was getting a little too comfortable right near the trail so was captured and put in time out until the trails were closed for the day and released back into the immediate vicinity of the capture.
~3ft long (didn't get close enough to measure, but definitely shorter than 4ft), rattles are a bit more clear in the 5th image