The Capitol Volkssport Club will hold a 10-kilometer walk through Olympia neighborhoods, parks and along the waterfront; 2 p.m. Monday; meet at Bayview Thriftway, 516 Fourth Ave., Olympia; pick up a parking pass in the wall box; free; capitolvolkssportclub.org.
Addie Candib, philanthropy and outreach coordinator, will give a presentation on the South of the Sound Community Farm Land Trust; the group works to promote sustainable, productive farmland; social time at 7 p.m., with program at 7:30 p.m. Thursday; Temple Beth Hatfiloh Social Hall, 201 Eighth Ave. SE, Olympia; free; blackhills-audubon.org.
Metro Parks Tacoma will offer two naturalist-led walks; not recommended for strollers or children younger than 3; 10-11 a.m. Saturday at Wapato Park, 6500 S. Sheridan Ave., Tacoma, and 1-2 p.m., Oak Tree Park, South 74th and South Cedar streets, Tacoma; free, but space is limited; sign up at metroparkstacoma.org or call 253-591-6439.
Member Alice Few will give a presentation on asteroids and comets during the Tacoma Astronomical Society’s public night event; sky viewing will take place after, weather permitting; 9 p.m.-midnight Saturday; Rainier Building, Pierce College Fort Steilacoom Campus, Lakewood; free; tas-online.org.