Boo at the Zoo | Colorado Springs

Oct. 19-21 and 26-28, 4-8:30pm

Trick or treat and enjoy Halloween festivities in a safe and unique environment. All of the candy is made with sustainable palm oil to help protect wild orangutans. Wear a costume and bring a trick-or-treat bag. Visit website for cost. Cheyenne Mountain Zoo, Colorado Springs. 719-633-9925. cmzoo.org

Boo At The Zoo | Denver

Oct. 20-21 and 27-28, 9am-5pm

See creepy crawly animal demonstrations and exciting family-friendly entertainment under the canopy of the beautiful fall foliage of the Denver Zoo. This event is included in the price of regular admission. $20 ages 12-64, $17 age 65 and up, $14 ages 3-11. Denver Zoo. 720-337-1400. denverzoo.org

Bugtober

Oct. 1-31, 9am-5pm

Get an up-close look at unbelievable animals and plants that use powerful venom and poison to dominate predators and prey. Free for members. Nonmembers: $12 adult, $10 Westminster resident, $10 seniors, $8 children, free age 2 and under. Butterfly Pavilion, Westminster. 303-469-5441. butterflies.org

Howl-O-Ween

Oct. 28, 4-6pm

Join the Colorado Wolf & Wildlife Center as they pass out meat-filled pumpkins to all the wolves. Enjoy a bonfire and refreshments. $30 adults, $15 ages 12 and under. Reservations required. Monthly Full Moon Tour runs on Oct. 20, and Full Moon Feeding Tours run on Oct. 19 and 20. Colorado Wolf & Wildlife Center, Divide. 719-687-9742. wolfeducation.org