Events Calendar

September 2025

Fri 12

Friday, Sep. 12 · 9:15 am - 2:15 pm Discovery Days Art Series

Discovery Days Art

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Fri 12

Friday, Sep. 12 · 10 am - 10:30 am All Ages Storytime Series

All Ages Storytime

Longmont Library 409 4th Ave., Longmont, CO, United States

Fri 12

Friday, Sep. 12 · 10:30 am - 11 am All Ages Stay and Play Series

All Ages Stay and Play

Longmont Library 409 4th Ave., Longmont, CO, United States

Fri 12

Friday, Sep. 12 · 2:30 pm - 4:30 pm

Friday Afternoon Concert: Boulder Philharmonic String Quartet

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Explore American Folk with the Boulder Philharmonic String Quartet as they push past the boundaries of 'Americana,' blending gospel, jazz, blues, bluegrass, and global folk influences.

Fri 12

Friday, Sep. 12 · 4 pm - 5 pm All Out League Series

All Out League

Longmont Youth Center 1050 Lashley St., Longmont, CO, United States

Sat 13

Saturday, Sep. 13 · 9:15 am - 2:15 pm Discovery Days Art Series

Discovery Days Art

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Sat 13

Saturday, Sep. 13 · 10 am - 2 pm Open House at Sandstone Ranch Series

Open House at Sandstone Ranch

Sandstone Ranch Visitors Center 3001 Sandstone Dr., Longmont, CO, United States

Sat 13

Saturday, Sep. 13 · 10:30 am - 11:30 am English Conversation Group Series

English Conversation Group

Longmont Library 409 4th Ave., Longmont, CO, United States

Practice English conversation with others in an informal, conversational setting. Some English experience suggested, but all welcome.

Sat 13

Saturday, Sep. 13 · 10:30 am - 12 pm History Tour at Sandstone Ranch Series

History Tour at Sandstone Ranch

Sandstone Ranch Visitors Center 3001 Sandstone Dr., Longmont, CO, United States

Sat 13

Saturday, Sep. 13 · 11 am - 11:30 am

Special Storytime with Guest Author Heather Preusser

Longmont Library 409 4th Ave., Longmont, CO, United States

Sat 13

Saturday, Sep. 13 · 12:30 pm - 2 pm History Tour at Sandstone Ranch Series

History Tour at Sandstone Ranch

Sandstone Ranch Visitors Center 3001 Sandstone Dr., Longmont, CO, United States

Sat 13

Saturday, Sep. 13 · 1:30 pm - 3:30 pm

Community Water Academy 

Longmont Senior Center 910 Longs Peak Ave., Longmont, CO, United States

Sun 14

Sunday, Sep. 14 · 2 pm - 3 pm

Dogs Enjoy Afternoon Reading (D.E.A.R.)

Longmont Library 409 4th Ave., Longmont, CO, United States

Mon 15

Monday, Sep. 15 · 9 am - Sunday, Sep. 21 · 5 pm

Lotería Scavenger Hunt

Longmont Library 409 4th Ave., Longmont, CO, United States

Mon 15

Monday, Sep. 15 · 10 am - 10:30 am Bilingual Storytime / Cuentos Bilingües Series

Bilingual Storytime / Cuentos Bilingües

Mon 15

Monday, Sep. 15 · 10:30 am - 11 am All Ages Stay and Play Series

All Ages Stay and Play

Longmont Library 409 4th Ave., Longmont, CO, United States

Mon 15

Monday, Sep. 15 · 3 pm - 5 pm

POSTPONED Water Advisory Board

Mon 15

Monday, Sep. 15 · 4 pm - 5 pm

Mythical Creatures Club: Greek Mythology

Longmont Library 409 4th Ave., Longmont, CO, United States

Mon 15

Monday, Sep. 15 · 4 pm - 5:30 pm Navigators Series

Navigators

Longmont Youth Center 1050 Lashley St., Longmont, CO, United States

Mon 15

Monday, Sep. 15 · 5:30 pm - 7 pm

Historic Main Street Walking Tour

Longmont Museum 400 Quail Rd., Longmont, CO, United States