‘Nature’s Creepy’ Mystery Trail at Thacher Nature Center.  Take a walk on the Nature Center Trail and discover cool and creepy natural objects and oddities along the way. Use the clues to complete the challenge and win a prize! Wear your Halloween costume if you like. Make Halloween crafts and enjoy warm cider and donuts. This fun (not scary) program is appropriate for all ages. 10 a.m. to 2 p.m. at 87 Stan Levine Dr, Voorheesville, 12186

Meet Nikki Giovanni, major American poet. In partnership with the UAlbany Africana Studies Department to mark its 50th Anniversary, and a half century of excellence. 7 p.m. at University at Albany Campus Center Ballroom, 1400 Washington Avenue, Albany.

Farm to Canvas. Presented by the Schenectady Art Society, a collection of works by local artists, inspired by our rural landscape. 2 to 4 p.m. at Mabee Farm Historic Site 1100 Main Street Rotterdam Junction, 12150

The Great Schenectady Farm Tour! Ride with us for this exclusive, behind-the-scenes tour of some of Schenectady's most remarkable farms. Tickets are $30 and available at www.schenectadyhistorical.org/programs. The tour meets at Mabee Farm at 8am and returns to the Mabee Farm at 2pm, 1100 Main Street Rotterdam Junction, 12150

Moonlight Walk at Thacher Park. Join us for a 2.5-mile hike to the escarpment at dusk. We’ll watch the full moon rise over the Hudson Valley from Hang Glider Cliff. Call 518-872-0800 to register. Meet at the Carrick Road trailhead at 6 p.m.

Museums & Criminal Justice: Finding Common Ground. 20-minute talk at The State Museum. From 12:10 to 12:40 p.m., in the Huxley Theater, 222 Madison Avenue Albany, 12230. Attendees are encouraged to bring their lunch.

Science Lecture Series: Pitch Pine Communities of New York. NY Natural Heritage Program Chief Ecologist Greg Edinger will present an overview of the natural communities in the state that have pitch pine as a characteristic species (10 natural communities) or present as a minor associate (6 natural communities.) Reservation required, pls call 518-456-0655 or visit www.AlbanyPineBush.org/events. Starts at 6:30 p.m. at  Albany Pine Bush Discovery Center, 195 New Karner Road, Albany, NY

Discover the Pine Bush. An extraordinary journey into the Albany Pine Bush – a globally rare, nationally significant and locally distinct inland pine barrens. Reservation required, pls call 518-456-0655 or visit www.AlbanyPineBush.org/events. Event starts at 10:30 a.m. at  Albany Pine Bush Discovery Center, 195 New Karner Road, Albany, NY

Stories from the Dirt. A celebration of International Archeology Day. 11 a.m. to 3 p.m. The Stephen and Harriet Myers Residence Campus 194 Livingston Avenue Albany, 12210. 518-432-4432

Creative Life: With Philippe Petit. Meet one of the greatest high wire artists of all time. Demonstration and reception at 6 p.m. at the University Art Museum, 1400 Washington Ave, Albany, 12222.