The Hopkinton Trails Club will host a guided walk of Peppercorn Hill on Saturday, Oct. 18, at 10 a.m. This trail follows the shoreline of Lake Maspenock, then climbs on new switchbacks to the Walleston Trail, which the walk will follow to the summit of Peppercorn Hill. Participants will meet at the corner of Scarlota Road and Deneen Road. For more information, visit hopkintontrailsclub.com.