Don't use AllTrails solely. Please get yourself a good set of maps. Too many people lose service and get off trail and either damage the environment or need rescue. AMC maps are great. Different MA DCR sites have maps at the trailhead (and online versions you can print or view ahead of time) at their individual sites that you can see here: https://www.mass.gov/lists/dcr-trail-maps.

This is my preferred site for the Whites: https://bmhatfield.github.io/white-mountains/.

But please bring a real map with you when you are going out beyond the Blue Hills, Fells, or your local trails.