The Hopkinton Trails Club will host a group walk at Upton State Forest/Tamarack Farm on Saturday, Dec. 14, at 10 a.m. These trails go through a mix of public and private lands, including a lesser-used section of Upton State Forest. Participants can meet at the pullovers on Pond Street at the southern end of Lake Whitehall (between School Street and Christian Way). For more information, visit hopkintontrailsclub.com.