Shake, Rattler and Roll
The rattlers seem to stay just off the main trail -- out of the way of the fairly heavy foot/bike/dog/horse traffic, but close enough to at least startle anyone near the edge (where I often tend to run).
As I ran off, I came upon three women on horses heading towards the snake. I warned them to control their horses. Lots of folks also let their dogs run off leash in that area. I hope that they and their dogs are prepared for an unexpected encounter with a territorial rattlesnake!