As I was looking for a race between Rock the Ridge 50m and Cayuga Trail 50m, I came across the Kettletown State Park trail races in CT, part of the Trail2Trail series. The races are held on a 10k loop that was described as challenging, and there were options for running 5k, 10k, 20k, or 50k. After Tammany and Breakneck, how hard could a race that never got over 650 feet of elevation be?