1 Lightweight hiking basics
A staff expert will offer tips on lightweight backpacking, including information on shelters, food choices, fuel efficiency and backpacks; 6:30-8 p.m. Wednesday; REI, 625 Black Lake Blvd. SW, Suite 410, Olympia; register at rei.com/olympia; free; 260-786-1938.
2 Walk through Lacey
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The Capitol Volkssport Club will hold a walk through historic Lacey; the route is 10 kilometers, with a 5-kilometer option; the route includes St. Martin’s University campus; meet at 10 a.m. Thursday at Safeway, 6200 SE Pacific Ave. SE, Lacey; free, unless you want to walk for credit; capitolvolkssportclub.org.
3 Theler Wetlands bird walk
Join leaders Faye Hands and John Riegsecker of the Tahoma Audubon Society for a walk through the wetlands near Hood Canal; 8 a.m.-noon Thursday; meet at Theler Community Center, 22871 state Route 3, Belfair; free; for more informaiton, contact Hands at email@example.com; tahomaaudubon.org.
4 Look into black holes
Tacoma Astronomical Society members Matt Flood and Louis St. Cyr will give a presentation on black holes at the group’s public night program; 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.