Yesterday I walked the Twin Branches Nature Trail, which is now part of the Cross-County trail. The last time I walked it there was huge earth-moving equipment deep in the woods and a new dam going in. I got hopelessly lost on the detour, was caught in a fierce summer thunderstorm and rescued by a homeowner who saw me shivering under a tree and invited me into his garage.

Sunday’s adventure was much calmer — although there was a little excitement. Here’s a sign I saw on my way into the woods. It was no problem heeding the warnings: Stay on the trail. Check. Do not overturn rocks or logs. Check again. Do not approach a copperhead. Check for sure on this one.

But my favorite part of the warning is this: [Copperheads] are Reston’s only venomous snake. Whew! I feel much better now.