Energy Savings for the Home Seminar, 10 a.m. to noon at the Derry Public Library, 64 East Broadway. Join the Derry EEAC to learn about simple things people can do to save energy and money this winter by reducing heat loss due to air infiltration, inefficient windows and poor attic insulation. Free admission and free refreshments. Call 603-721-2994.
Flea Market, 8 a.m. to 1:30 p.m. at the Trinitarian Congregational Church, 72 Elm St., North Andover. Includes a bakery, jewelry and book tables. There will be raffles and more. Dealers wanted; 9ft tables are $20. Call 978-886-2191.
Fall Festival, noon to 3 p.m. at Greycourt Park, Methuen. Come by and meet the Methuen Rail Trail. Raffle tickets, T-shirts and other items will be available for purchase to help fund efforts to move the trail forward. Informational handouts and membership applications will also be available. Call 978-685-3639, email firstname.lastname@example.org or visit methuenrailtrail.org.
Sunday, Oct. 27
17th Annual Lawrence Vietnam Memorial Run or Walk 4 Mile Road Race, 11 a.m. beginning and ending at the Claddagh Pub, 399 Canal St., Lawrence. The walk will begin at 10:30 a.m. Advance registration is $20, $25 on the day of the race. For race applications, email TheCooze14@yahoo.com.
Fourth Annual Wounded Warrior Breakfast & Raffle, 9 a.m. to noon at the Lawrence Lodge of Elks, 650 Andover St. Tickets are $8 for adults, $5 for children under 10. Tickets will be available at the door.
Trail maintenance, 8:30 a.m. beginning at the end of Pine Street, across from the central fire station. The Methuen Rail Trail will be working on the trails in the Nevins Bird Sanctuary. Bring gloves and loping shears or pruners. Snacks and water will be provided. Spend an hour and help keep the area, just off the trail, open and usable. Call 978-685-3639, email email@example.com or visit methuenrailtrail.org.
Monday, Oct. 28