“For Small Creatures Such As We” — Sasha Sagan will speak about and sign her new book, “For Small Creatures Such as We: Rituals for Finding Meaning in Our Unlikely World.” She will be in conversation with Saralyn Ward for this special event; 7:30 p.m., Oct. 29, Boulder Book Store, 1107 Pearl St., Boulder; $5; 303-447-2074.
Ultra-Beginners Yoga — Yoga can lessen pain, arthritis, lower blood pressure and increase flexibility. This class is designed for first-timers or people who would like to go through the poses at a slower pace. Instructor Shari Polis will break down the basics while building up to a gentle flow to help your mind and body relax; 9 a.m., Oct. 29, Boulder Jewish Community Center, 6007 Oreg Ave., Boulder; 720-749-2531.
Boulder Tuesday Hikers — Come join us on a day hike. We are a drop-in group, and we decide each time where to hike. We carpool to trailheads and reimburse the drivers for expenses. Bring lunch, water and snacks, and be prepared for all weather conditions; 9 a.m., Oct. 29, North Boulder Park, 7th & Dellwood, Boulder; free; 303-494-8822.
TED Talk screening — Golden West will hold a screening and discussion about “Inside the Bizarre World of Internet Trolls and Propagandists,” a recent TED Talk by Andrew Marantz; 10:30 a.m., Oct. 29, Golden West Senior Living, 1055 Adams Circle, Boulder; free.
Twisted Tuesday 5K Lunchtime Run — Join us for an easy 5K run up Boulder Creek Canyon, and return for free appetizers and $5 pints after the run. All ability levels are welcome; noon, Oct. 29, InMotion Running, 1880 30th St., Unit B, Boulder; free; 720-808-7232.
Find Your Park: RMNP —Get an introduction to the details necessary to unlock your next adventure including must-see destinations within the park, trip ideas and logistics. We’re ready to help get beyond the roads and turnouts to engage deeply with these public land resources; 6:30 p.m., Oct. 29, Finkel & Garf Brewing Company, 5455 Spine Road, Boulder; free; 303-583-9970.
Mad Scientist Day: Halloween Candy Experiments — Have what it takes to be a mad scientist? Come ready to learn, play and explore. Ages 3 and up; 4 p.m. Wednesday, Oct. 30, George Reynolds Branch, 3595 Table Mesa Drive, Boulder.
Musical Storytime — All ages are welcome to join us for a storytime full of songs, musical stories, dancing and more; 10:15 a.m. Wednesday, Oct. 30, Boulder Public Library, 1001 Arapahoe Ave., Boulder.
Sofie Engstrom von Alten: “Dino Does Yoga” — Sofie Engstrom von Alten will speak about and sign her new book, “Dino Does Yoga”; 5:30 p.m. Wednesday, Oct. 30, Boulder Book Store, 1107 Pearl St., Boulder; free; 303-447-2074.
“Nobuntu” — “Nobuntu”— an expression meaning feminine familial love, humility and kindness — is a female a cappella quintet from Zimbabwe that has drawn international acclaim; 7:30 p.m. Wednesday, Oct. 30, Macky Auditorium, 1595 Pleasant St., Boulder; $20-$66; 303-492-8008.