This is a very popular section of trail because of the commanding heights from Norwottuck and Long Mountains, the overhanging ledges of Mount Norwottuck, and the so-called "horse-caves" of Revolutionary War days. It is a ridge top trail in unbroken forested terrain running entirely through atypical hardwood forest and hemlock coves, a region that is a delight to naturalists and nature lovers. The orange-blazed Robert Frost Trail is co-aligned with the M-M Trail for much of this section. The state run Notch Visitors Center on MA 116 offers parking, water, restrooms, and natural history exhibits inside.