Amethyst Brook Conservation Area Share: Parks and Wildlife Sanctuaries Amethyst Brook Conservation Area Pelham Road East of Amherst Center Amherst, MA 01002 (413) 259-3045 About About Established in 1988, Amethyst Brook encompasses a total of 44 acres. The Robert Frost Trail runs through the conservation area. Parking is located off of Pelham Rd.