Parents and children can drop in between 4-6:30 p.m. on April 26 at the library’s event room to learn about trails in town. There will be activities and prizes, plus information about geocaching, mountain biking, trail running, building stuff in the woods and more. Representatives from the Trails Club, Hopkinton Area Land Trust, Upper Charles Trail Committee, Parks & Rec, New England Mountain Bike Association, YMCA, Wildwood Learning Center and Mass. Audubon will be on hand along with the sponsoring organizations, the Hopkinton Trail Coordination and Management Committee and the library. For more information, visit HopkintonMA.gov/Trails.