The Burrillville Conservation Commission will hold a series of guided hikes of the Nipmuc River Trail, with events to be held on Saturdays, April 15, July 15 and Oct. 14. Participants will meet up at 9:45 a.m. at Callahan Elementary School and board a bus for a short drive to the trailhead for hike lead by Martha Thoman from 10 a.m. to noon. Hikers are advised to dress for the weather and wear comfortable walking shoes, Dogs are not permitted on the hikes, but children are welcome. The events will be rescheduled in the event of high wind, rain or snow.