September 2025

Fri 12

Discovery Days Art (9/12/2025)

Friday, Sep. 12, 2025 · 9:15 am - 2:15 pm Discovery Days Art Series

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

Fri 12

Friday Afternoon Concert: Boulder Philharmonic String Quartet

Friday, Sep. 12, 2025 · 2:30 pm - 4:30 pm

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

All Out League

Friday, Sep. 12, 2025 · 4 pm - 5 pm All Out League Series

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

Sat 13

Discovery Days Art (9/13/2025)

Saturday, Sep. 13, 2025 · 9:15 am - 2:15 pm Discovery Days Art Series

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

Sat 13

Open House at Sandstone Ranch

Saturday, Sep. 13, 2025 · 10 am - 2 pm Open House at Sandstone Ranch Series

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

Sat 13

English Conversation Group

Saturday, Sep. 13, 2025 · 10:30 am - 11:30 am English Conversation Group Series

Longmont Public Library 355 Emery St., Longmont, CO, United States

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

Sat 13

History Tour at Sandstone Ranch (10:30 am–12:00 pm)

Saturday, Sep. 13, 2025 · 10:30 am - 12 pm History Tour at Sandstone Ranch Series

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

Sat 13

History Tour at Sandstone Ranch (12:30 pm–2:00 pm)

Saturday, Sep. 13, 2025 · 12:30 pm - 2 pm History Tour at Sandstone Ranch Series

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

Sat 13

Community Water Academy 

Saturday, Sep. 13, 2025 · 1:30 pm - 3:30 pm

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

Sun 14

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

Sunday, Sep. 14, 2025 · 2 pm - 3 pm

Longmont Public Library 355 Emery St., Longmont, CO, United States

Mon 15

Lotería Scavenger Hunt

Monday, Sep. 15, 2025 · 9 am - Sunday, Sep. 21, 2025 · 5 pm

Longmont Public Library 355 Emery St., Longmont, CO, United States

Mon 15

POSTPONED Water Advisory Board

Monday, Sep. 15, 2025 · 3 pm - 5 pm

Mon 15

Mythical Creatures Club: Greek Mythology

Monday, Sep. 15, 2025 · 4 pm - 5 pm

Longmont Public Library 355 Emery St., Longmont, CO, United States

Mon 15

Navigators

Monday, Sep. 15, 2025 · 4 pm - 5:30 pm Navigators Series

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

Mon 15

Historic Main Street Walking Tour

Monday, Sep. 15, 2025 · 5:30 pm - 7 pm

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

Mon 15

Library Board Meeting

Monday, Sep. 15, 2025 · 7 pm - 9 pm Library Board Meeting Series

Tue 16

Bird Walk at Sandstone Ranch

Tuesday, Sep. 16, 2025 · 7:30 am - 10 am Bird Walk at Sandstone Ranch Series

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

Tue 16

Discovery Days Music & Movement

Tuesday, Sep. 16, 2025 · 9:15 am - 2 pm Discovery Days Music & Movement Series

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

Tue 16

Studio Series: Intro to Watercolor

Tuesday, Sep. 16, 2025 · 9:30 am - 11:30 am Studio Series: Intro to Watercolor Series

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

Tue 16

Lanyon Park Historic Walking Tour

Tuesday, Sep. 16, 2025 · 10 am - 11 am

Lanyon Park 1900 Collyer Street, Longmont, Colorado, United States