Skeleton Ball: Mi Chantli, a community dance and arts space, hosts a Baile de Calaca, or Skeleton Ball, which will have a DJ spinning tunes and various dance performances by local bands. There will be live painting and sculpture as well as a silent online art auction to benefit the studio; 6 p.m. Saturday, Mi Chantli, 1750 30th St., Unit 22, Boulder; $25; bit.ly/3zO1rcP.
Opening night “The Royale” at Dairy: Set in a boxing ring, Marco Ramirez’s acclaimed play delves into the racial issues of the Jim Crow era as black boxer Jack Johnson fights for a historic victory; opening night 7:30 p.m. on October 29; runs until November 19; Carsen Theater at the Dairy Arts Center, 2590 Walnut St., Boulder; $25 to $60; betc.org.
Blacklight Psychedelic Escalation: Psychedelia is an immersive, nationally recognized blacklight climbing contest featuring comics, unique bouldering problems, crazy costumes, live entertainment, food and beer; youth contest 9 a.m. and 1 p.m. Saturday, adult contest 6 p.m. Saturday; The Spot Bouldering Gym, 3240 Prairie Ave., Boulder; $15 to $75; .thespotgym.com.
Boulder Farmers Market: Boulder’s Saturday Market wraps up November 19, so head downtown and pick up fresh veggies, local artisan goods, and listen to live folk, blues, and jazz tunes from Laurie D; 10 a.m. Saturday, Boulder Farmer’s Market, 13th and Canyon, Boulder; Free; bcfm.org.
Lafayette Fall Harvest: This market will host vendors selling seasonal agricultural produce and artisan foods. Attendees can come in costume and there will be a petting zoo, pet parade, live music, beer, wine, hard cider, food trucks and more; 10am-4pm Saturday; on North Harrison Avenue between East Simpson and East Geneseo Streets, Lafayette; cityoflafayette.com.
QTPOC nature walk: Join Out Boulder County’s Ruby Lopez and Boulder County Ranger Jose Barrientos for an enjoyable fall hike on the Meyers Homestead Trail at Walker Ranch to talk nature and enjoy each other’s company LGBTQ+; 11 a.m. Saturday, Meyers Gulch Trailhead, 6532 Flagstaff Road, Boulder; Free; outboulder.org.
The sound treasure of Boulder Symphony: During this children’s concert, two pirates from the orchestra are looking for the treasure on their maps. They explore the orchestra together, sparing no effort, as the music reveals clues to the whereabouts of the treasure. Children can wear sea clothes while listening to sea shanties; 3 p.m. Saturday, First United Methodist Church, 1421 Spruce St., Boulder; bouldersymphony.org.
Día de los Muertos at the Dairy: Celebrate Day of the Dead with live music from Trio Talismán, altar display, raffles, pan de muerto, raffle, catrina costume contest, face painting, folkloric dancing, food truck and more ; 4 p.m. Saturday, Dairy Arts Center, 2590 Walnut St., Boulder; Free; thedairy.org.
The Boulder Concert Band performs “Tuneful Conucopia”: Celebrate the Boulder Concert Band’s 47th season opener for “A Tuneful Cornucopia” of musical styles ranging from Eric Whitacre’s “October,” Robert Buckley’s “Jitterbug” to Sousa’s “Hands Across the Sea”: 7 p.m. Saturday , First Congregational Church, 1128 Pine St., Rock; $10; BoulderConcertBand.org.
Southern Sun Halloween with Rolling Harvest: Celebrate Halloween with a free Southern Sun party featuring Rolling Harvest, a Boulder-based tribute to Bob Dylan and Neil Young, featuring Gasoline veterans Lollipops, the Yawpers, Velveteers and Banshee Tree; 9 p.m. Saturday, Southern Sun, 627 S. Broadway St., Boulder; Free; facebook.com/events/812210759923464.
Pearl Street Paranormal Haunted Story: Explore real stories from Boulder’s haunted past on a 90-minute haunted history walking tour. Many of Boulder’s earliest residents are said to have been victims of murder and mayhem, criminal acts and mortal misfortunes – and some say that not everyone who left this mortal life “rest in peace forever”, the site says. visit ; 7 p.m. and 9 p.m. Saturday; book online at ramblinrosiesbouldertours.com.
Frankenstein Theater Hike: Arts in the Open’s “Frankenstein” takes guests on a moderate hike, re-enacting scenes set in the icy polar regions where scientist Victor Frankenstein hunted the creature he brought to life. Due to adult themes, guests must be 10 years and older; 3 p.m. on Saturdays and Sundays; Chautauqua Park, 900 Baseline Road, Boulder; $16 to $21; chautauqua.com.