This trail starts at the left end (as you face the visitors Center) across a bridge into an overflow lot. There is a trail head sign.It's 2 miles on the Direttissima trail until it runs into Glen Boulder trail. This is a steep and rocky trail. It was a challenge for Judy and I. Plus the black flies were a problem even with deet. There is a boulder that sits out by itself ie Glen Boulder Trial. If you continue you can make it to the top of Mt. Washington. We turned around at the Boulder.