The Berkshires are a great place to hike with your dog. Within a short drive you can be scaling mountains that leave your dog panting, exploring impossibly green glens that will set tails to wagging or circling lakes for miles and never lose sight of the water.What makes a great place to take your dog hiking? Well, how about a paw-friendly surface to trot on? Grass and sandy soil are a lot more appealing than asphalt and rocks. A variety of hikes is always good - long ones for athletic dogs and short ones for the less adventurous canine. Dogs always enjoy a refreshing place to swim as well. For dog-friendly parks our guides describe the trail options for your dog, evaluate park traffic from other users, tell you whether you will need a guide dog to find your way around and, of course, tell you how to get to the park.While walking the dog around the Berkshires, we bring along generous helpings of local history, botany, geology, architecture and more. So what are you waiting for? Your dog will want to visit a 165-ton glacial erratic (page 31), spot the elusive Massquatch (page 67), hike through a herd of free- range Hereford cattle (page 27), hike through modern art sculptures (page 47), hike with your dog past the only marble dam in America (page 83)...