I am no snake expert, but I think I came across my first copperhead on the trail this year. I can say it startled me big time, just about had a heart attack!
I basically stood there for about a minute and waited for the snake to slither its way into the woods. I thought about trying to go around it but that would mean I would need to go off the trail I was convinced there were other snakes waiting for me! So I just waited, patiently.
Call me a wuss--but one of my trail running rules is... don't play with the snakes!