From Boston Metro-West, Nashua & Manchester, NH: Follow I-93 North through Franconia Notch to Exit 35, Rt. 3 North. Follow Rt. 3 through Twin Mountain, NH. Then take Rt. 115 to Rt. 2 in Jefferson, NH, follow Rt. 2 East to Rt. 16 and then follow Rt. 16 eight miles South out of Gorham, NH to the Mt Washington Auto Road.
Although autumn (late September/early October) in the White Mountains is, arguably, unmatched anywhere, brace yourself for the crowds of leaf peepers who drive through these forests this time of year. Book early for your stay, and avoid Route 16 between Conway and Jackson if you hate to be stuck in heavy traffic, especially on weekends. That caveat aside, these mountains are a great destination any time of year. Other attractions: Mt Washington Auto Road and Cog Railway, Conway Scenic Railway, good hiking, hotels, restaurants....
An early October storm was just clearing. The fall color in the trees was brilliant in the new sunlight, contrasting nicely with the fast-moving cloud shadows. Viewpoint was from Glen House, adjacent to the entrance to the Mt Washington Auto Road.