In keeping with CDC recommendations, returned materials are quarantined for four days prior to being checked in. 

After-Hours Book Drops

Norlin Library book drops are located near both the east and west entrances.

The L.H. Gemmill Engineering, Mathematics & Physics Library has a drive-up, outdoor book drop located on the west side of the Mathematics Building.

The William A. Wise Law Library has a book drop located in Lot 402 by the Garden Level entrance to the Wolf Law Building.

Please contact for direction regarding items too large to fit in the book drops, or to arrange returns of hot spots, laptops and other technology.

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The following after-hours book drops are currently unavailable:

Return by Mail

Circulation Department
University Libraries
184 UCB
1720 Pleasant Street
University of Colorado
Boulder, CO 80309-0184

Other Libraries

Books may also be returned to most libraries in Colorado, though the user assumes full responsibility for items returned at these locations. Items don’t count as being returned until they are returned to the University Libraries. Be sure to allow at least one week for transit if using this service.

  • Colorado public libraries
  • Colorado academic libraries
  • William A. Wise Law Library (Currently unavailable)


When in-person services are available, we strongly recommend you obtain a receipt for returned books. A receipt may be obtained at the Norlin Circulation Desk or any branch library Circulation Desk.


Reserve items must be returned to the Reserve Desk at the library where they were borrowed.