"Railroads of Caribou" at the Caribou Historical Center and Museum. Open 12-4 p.m. Saturdays; 1033 Presque Isle Road. All are welcome.

Shorebirds observation walk at Christina Reservoir, 8 a.m, with Aroostook Birders. Meet at the reservoir access point on Conant Rd. Rain or shine; ending by 11 a.m.

Roast pork supper at Southern Aroostook Ag. Museum, 4:30-6 p.m. $9/person.

Farmers' market at Riverside Park, 8:30 a.m.-1 p.m. Vegetables, meat, eggs, baked goods and more. Concession available.

Baked bean, hot dog and coleslaw dinner, 4:30-6:30 p.m. at Stetson Memorial United Methodist Church. To benefit youth programs.

History and Use of the Northern Maine Woods, presentation by Al Cowperthwaite, 1 p.m. at the Nylander Museum of Natural History.

Recovery Walk, starting at 9:30 a.m. at the Rec Center parking lot, down Pleasant St., through Market Square to the bridge. People may speak about their own recovery or a […]

Bridge at the Putnam House Senior Center, 48 Court St., 10 a.m.-2 p.m. Lunch available.

Red Cross blood drive, 10 a.m.-3 p.m., Caribou VFW Post 9389. Download Red Cross blood donor app, visit RedCrossBlood.org or call 1 (800) 733-2767 FMI or an appointment.

Senior gatherings at the Putnam House 48 Court St. Houlton, Tuesdays and Thursdays, 9-3 p.m. Games, homemade snacks, coffee and socializing.