Grafton-Dunham Loop (NY)
The trails at Grafton Lakes State Park (near Albany) are some of the best in the area. They are technical but not terribly steep making them runnable from start to finish. The trails are easy to underestimate, some days leading to giving up in frustration partway through the run. On other magical days it’s possible to literally rise above the obstacles and fly through the woods letting your effortless speed smooth out the trail. The loop was inspired by a run Ethan K. had done here years ago.