Complex sentence: A seasonal auto road climbs to the summit of Mount Holyoke and many miles of trails criss-cross the range, including the 110 mile Metacomet-Monadnock Trail and the 44 mile Robert Frost Trail.
Split into simpler sentences: A seasonal auto road climbs to the summit of Mount Holyoke. Many miles of trails criss-cross the range, including the 110 mile Metacomet-Monadnock Trail and the 44 mile Robert Frost Trail.