Events in Longmont — December 2026 (115 Things to Do)

December 2026 in Longmont, Colorado brings 115 live events across the city, led by family (32), trivia & games (26), sports (17). 2 events are explicitly listed as free. Here's what's on.

Frequently Asked Questions

What's happening in Longmont in December 2026?

There are 115 events in Longmont, Colorado in December 2026, including Open Mic Night at Grossen Bart Brewery, Toddler Stay & Play at Longmont Public Library, STEAM Labs Science Program: Glow Paint at Longmont Public Library, Open Chess Night @ the Library at Longmont Public Library. Browse the full December 2026 calendar on VenuNite.

Are there free things to do in Longmont in December 2026?

Yes — 2 December 2026 events are explicitly listed as free in Longmont. Confirm current entry details on the event page or organizer source.

How do I find events in Longmont for a specific date in December 2026?

VenuNite lists every upcoming event in Longmont, Colorado with date filters. Use the date picker on this page to narrow December 2026 down to a single day or weekend.

Events in Longmont — December 2026

All December 2026 Events

Frequently Asked Questions

Browse Live Events by State

Events in Longmont — December 2026

All December 2026 Events

Frequently Asked Questions

Open Mic Night

Toddler Stay & Play

STEAM Labs Science Program: Glow Paint

Open Chess Night @ the Library

Teen Dungeons & Dragons

Boombox Bingo with Geeks Who Drink

Tuesday Night Live Music with Drew Moore

Baby Stay & Play

Kids Club

Make and Take Station: Pinecone Gnomes

Teen Anime Club

Tween Gaming Club

Trivia Night

Pub Quiz with Geeks Who Drink

Useless Knowledge Society Trivia Night

Karaoke with Nic's Mobile Music

Yoga Storytime

Spanish-English Conversation Group

First Thursdays Book Group

The Great Ideas Reading and Discussion Group

Tween Club

Prairie Dog Management Annual Public Meeting

Thursday Night Football at Grossen Bart Brewery

Soundpost Sessions SPOTLIGHT: Road Pony w/ Alright Alright

Front Range Agility Club NADAC Dog Agility

Voyage Into Presence

All Ages Storytime: Friday

All Ages Stay & Play Friday

Crafts and Cocoa at the Library

A dance for the Wild

Boulder County Farmers Market Winter Market

Front Range Agility Club NADAC Dog Agility

Ugly Sweater 5k @ Left Hand Brewing Co. | 2026 CO Brewery Running Series

English Conversation Group

All Ages Storytime: Saturday

Jigsaw Puzzle Competition

Boulder County Farmers Market Winter Market

Front Range Agility Club NADAC Dog Agility

Lotería Mexicana

Monday Night Football

Bilingual Storytime

All Ages Stay & Play Monday

First Monday Craft Kits

Drop-in Writers Group (for Adults)

Teen Try it Out

Jeopardy! Bar League With Geeks Who Drink

Open Mic Night

Toddler Stay & Play

Open Chess Night @ the Library

ASL (American Sign Language) Conversation Group

Teen Writers' Group

Boombox Bingo with Geeks Who Drink

Teen Gaming Club

Trivia Night

Pub Quiz with Geeks Who Drink

Vision Zero Task Force - December Meeting| Reunión de Visión Cero - Dic.

Workshop | Gift Wrapping W/ Hilary

Useless Knowledge Society Trivia Night

Karaoke with Nic's Mobile Music

Open Mic Night

Open Mic Night

Toddler Stay & Play

Toddler Stay & Play

STEAM Labs Science Program: Glow Paint

STEAM Labs Science Program: Glow Paint

Open Chess Night @ the Library

Open Chess Night @ the Library

Teen Dungeons & Dragons

Teen Dungeons & Dragons

Boombox Bingo with Geeks Who Drink

Boombox Bingo with Geeks Who Drink

Tuesday Night Live Music with Drew Moore

Tuesday Night Live Music with Drew Moore