Tuesday

Boulder Tuesday Thursday Hikers: Come join us on a day hike. We are a drop-in group that decides each time where to hike. We break into smaller groups and carpool to various trailheads, reimbursing drivers for expenses. Bring your lunch, water, and snacks, and be prepared for all weather conditions. Please note: We are a leaderless group, and each person hikes at his/her own risk. We follow all applicable rules and regulations. North Boulder Park, Seventh and Dellwood, Boulder; free; 9 a.m. Details, 303-494-8822.

Wednesday

Duck ID Workshop: Learn to ID our ducks in this two-part duck ID workshop. Front Range Birding Company, 5360 Arapahoe Ave, Ste. E, Boulder; free; 6:30 p.m. Details, 303-979-2475 or facebook.com/events/1998733913664823/1998733923664822/?ref=news