Join the Olympia-Thurston County Stream Team and Native Plant Salvage with tree planting and maintenance along the nature trail; volunteers will receive a temporary Discover Pass; 10 a.m.-noon Monday; McLane Creek Nature Trail; 5044 Delphi Road SW, Olympia; sign up at streamteam.info/getinvolved/calendar..
Kittitas Audubon Society member Jim Briggs will give a program on the grouse species of Washington and how climate change might affect these birds; Briggs studied prairie chickens in Kansas and is a retired agent with Cornell Cooperative Extension in New York; 7:30-9 p.m., Thursday, doors open at 7 p.m.; Tacoma Nature Center, 1919 S. Tyler St., Tacoma; tahomaaudubon.org..
This rides takes participants over the three new bridges on the Chehalis Western Trail; the ride will cover 42 miles with 1,159 feet of elevation gain at a moderate pace (14-16 mph); 10 a.m. Saturday; start at Dancing Goats, 4219 Sixth Ave. SE, Lacey; ride leader is Don Dubois, firstname.lastname@example.org; capitalbicycleclub.org/wp/calendar..
The South Sound chapter of Surfrider Foundation will celebrate International Surfing Day with a beach cleanup and barbecue; bring a kayak or standup paddleboard to hit the water afterward; cleanup is from 10 a.m.-noon Saturday, other events follow; Owen Beach, Point Defiance Park, 5400 N. Pearl St., Tacoma; southsound.surfrider.org..