Boo at the Zoo: Oct. 27-28. 9am-4pm. Trick-or-treat at special prize doors throughout the zoo. Also featuring storytellers, magicians and animal demonstrations. Denver Zoo; $9 adults, $5 ages 3 to 11. Free age 2 and under. Denver's City Park, 23rd Ave. between Colorado Blvd. and York St. 303-376-4800. www.denverzoo.org.
Bug-a Boo: Oct. 27-28, 9am-7pm. Costume parade, cockroach races, spooky tales and trick-or-treat. Free with admission. Adults $7.95, Children 3-12, $4.95, seniors $5.95. Butterfly Pavilion, 6252 W. 104th Ave., Westminster. 303-469-5441. www.butterflies.org.
Chatfield Corn Maze: Get lost in the giant cornfield maze this fall at the Denver Botanic Gardens at Chatfield’s Corn Maze. Open every Friday, Saturday and Sunday from Sept. 7 to Oct. 28. Two 15-foot-tall illuminated bridges will overlook the giant corn maze and a “mini-maze” adventure for younger children. Fridays, 4-9pm; Saturdays, 10am-9pm; Sundays, noon-8pm. $8 adults; $6 children 3-15; $7 seniors. Ticket windows close one hour in advance of maze closure. Denver Botanic Gardens at Chatfield, 8500 Deer Creek Canyon Rd. in Littleton, just south of C-470 on Wadsworth Boulevard. 303-973-3705. www.botanicgardens.org.
Fright Fest: Weekends through Oct. Free trick-or-treating for little ones, family entertainment shows and “frightfully” fun activities for all ages. Costumes encouraged. $21-$37 includes admission to amusement park rides. Ages 3 and under free. $8 parking. Elitch Gardens, 2000 Elitch Circle, Denver. 303-595-386. www.elitchgardens.com.
Garden of Goodies: Oct. 26-27. Trick-or-treating around a lighted and decorated garden. All ages. Free. Hudson Gardens and Event Center, 6115 S. Santa Fe Dr., Littleton. 303-797-8565. www.hudsongardens.org.
Halloween Fest: Oct. 27-28. Noon-4pm A kid-friendly Halloween celebration featuring candy, a bounce house and Downtown Aquarium mascots Sharky, Octavious and Java. Stage shows, crafts and refreshments. Ages 2-14. Free events take place outdoor and in the first floor of the aquarium. Downtown Aquarium, 700 Water St., Denver. 303-561-4450. www.downtownaquariumdenver.com.
Haunted Hayrides: Oct. 26-27 6-9pm, Oct. 28, 5-8pm. Rides take place every 20 minutes. Professional storytellers narrate an amusing tale while you rumble down a trail just south of Highlands Ranch. Refreshments available for purchase. $11 adults, $8 children 12 and under, age 2 and under free. All children must be accompanied by an adult. Stockton’s Plum Creek Stables, 7479 W. Titan Rd., Littleton. 303-791-8958. www.hrcaonline.org.
Fall Farmfest: Sat. and Sun. in Oct., 10am-3pm. Feed the baby animals, ride the pony, collect eggs, climb the giant treehouse, gather pumpkins and more. Sun. only: haywagon rides/scarecrow contest. Pay one price, Sat. $7/kids $3/adults; Sun. $7 per person. Lunch available for extra purchase. Sunflower Farm. 11150 Prospect Road, Longmont. 303-774-8001. sunflowerfarminfo.com.
Fall Festival: Open at 10am daily through Oct. 31; closing hours vary. “Pirates of the Cornibbean” corn maze, wagon rides to pumpkin patch, barrel train rides, playground, “ghost town,” food and more. All ages. $10 adults, $8 ages 4-12 and seniors over age 60. Discount coupons available on Web site. Anderson Farms, 2 ½ miles west of I-25 at Hwy. 52 and Road 3 ¼, Erie. 303-702-1844. www.andersonfarms.com.
Halloween Trail: Oct. 20-21. With “The Mystery of the Missing Pine Cones: A Halloween Whodunit…” visitors can travel with a naturalist and solve a pine cone mystery. Suggested donation $10/family. Designed for families with kids ages 4-10 years. The adventure begins every 15 minutes. Advance registration is required. Lookout Mountain Nature Center, 910 Colorow, Golden. 720-497-7600. www.jeffco.us/openspace.
Haunted Tours: Oct. 2-31. 1pm, Tues.-Sat. The historic Brown Palace hotel in downtown Denver will host a series of free 45-minute guided tours of the hotel. The guide will tell tales of mysterious sightings and disturbances from the hotel’s 115-year past. All ages. Free. Reservations are required. Brown Palace Hotel, 321-17th St., Denver. 303-297-3111. www.brownpalace.com.
Murray Corn Maze and Haunted House: Through Oct. 31. Four miles of trails through maze, plus an indoor haunted house. $12. ¼ mile south of 112th Ave. on Havana St., Brighton. 303-289-4264. www.murraymaze.com.
Rocky Mountain Pumpkin Ranch: Through Oct. 31. 9am-6pm.Weekdays, $6 per child includes pumpkin, ear of corn, hay maze, petting zoo and tour. Weekends, free admission, with minimal fee for carnival rides and other activities. Hwy. 66, 9 miles west of I-25, Longmont. 303-684-0087. www.rockymtnpumpkinranch.com.
Saturday Screamers: Every Sat. in Oct., 10am-4pm, join the Wildlife Experience for family frights and fun. The day features crafts, movies, face painting, spooky stories and other activities leading up to Halloween. Free with museum admission. The Wildlife Experience; $7.95 adult, $6.95 senior, $4.95 child; children 2 and under are free. 10035 S. Peoria, Parker. At the intersection of Lincoln Ave. and Peoria St., 1 mile east of I-25. 720-488-3300. www.thewildlifeexperience.org.
Trick-or-Treat Street: Oct. 29-31. 9am-8pm.A non-scary alternative featuring a “buggy” theme. See the museum as it's transformed into a creepy-crawly fantasyland with music, stories, crafts, games, theater performances, candy and more. Children's Museum of Denver;Members free. $7.50 ages 1 to 59, $5.50 seniors and age 1, under age 1 free. Seniors are free the first Fri. of the month. I-25 and 23rd Ave. 303-433-7444. www.cmdenver.org. .