ReTree Steamboat — Steamboat Ski Area, 8 a.m. to 2 p.m.
Volunteers are needed to help plant more than 1,000 trees. Wear closed-toe shoes and pants. Water and snacks are provided, but bring a water bottle. Bring tools if you have them. Followed by barbecue with beer and live music as well as a woodworking sustainability expo. Register at www.tinyurl.com/cgvvyw4.