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Masks are required in all indoor public spaces for those age 2+ regardless of vaccination status. More about the public health order.

Hours of operation have changed. NoBo Corner Library reopened Saturday, Oct 9. Reynolds Branch Library offers hold carryout appointments.

Main Library

Main Library Arapahoe entrance
1001 Arapahoe Ave, Boulder, CO 80302

Phone: 303-441-3100
Library Closings
Events Calendar
Meeting and Study Room Information

Open Hours

  • Mon
    9 - 7
  • Tue
    9 - 7
  • Wed
    9 - 7
  • Thu
    9 - 7
  • Fri
  • Sat
  • Sun

Visit our Makerspaces: BLDG 61 and The Digital Foundry.

Check out a Bcycle Book A Bike card to borrow a bike from Bcycle, available at this location only.


Get Directions   Transit   Parking


Parking Rates for Civic Area and Main Library

Saturdays & Sundays: free parking

Mondays – Fridays: 9 a.m. to 7 p.m.
The first 90 minutes of parking are free. An additional 90 minutes may be purchased for $1.25/hour. Kiosks accept credit cards and coins. You can also use the ParkMobile app on your smartphone. In the app, input your vehicle and payment info, and enter the code for the lot you’re parked in, both Main Library parking lots are 95136. Please note: there is a fee per transaction, even for the free 90 minutes each day. If you would prefer to avoid this fee, please use a kiosk.

If you need to park longer than 3 hours, please park in a public parking garage nearby to avoid a ticket.

Parking on Saturday, Sunday and city holidays is free in the Main Library parking lots and city parking garages. The closest parking garages to the Main Library are at 10th and Spruce (St Julian Hotel) as well as 11th and Spruce (Randolph Center). You can use the pedestrian crossing at 10th and Canyon Blvd to access St Julian and the pedestrian crossing at 11th and Canyon Blvd to access the Randolph parking structure.

Questions about parking, please contact Parking Services at (303) 413-7300.