Locations & Hours

After 5pm on weekdays and all day on weekends/holidays, you must show a Caltech ID, Caltech Library Borrower's Card, Caltech Library Guest Reader's Card, JPL badge, or Caltech Alumni Association ID card for access. After midnight, you must have a valid Caltech ID. For students interested in study space outside of the Library’s hours, please contact your Option Admin about access to your academic buildings.

People who have offices in Cahill have access to that library 24 hours.

HSS Faculty have 24 hour access to this library with their ID card. If your ID card does not work, please contact Campus Security (x4701).

Faculty, students, and staff within the GPS division have 24 hour access to this library with their ID card. If your ID card does not work, please contact Campus Security (x4701).

Access to the building, after 5pm on weekdays and all day on weekends/holidays, is limited to card swipe access by current Caltech faculty, postdocs, students and staff. Access to the Millikan basement can be made through the elevators and only by Caltech students, faculty, and staff, who can swipe their card in the elevator. Users can exit the Millikan basement by the elevator or stairwell door.

* Access to the Caltech Archives for the non-campus community is by appointment only. Campus community is encouraged to phone or write ahead to be sure of staff assistance and space availability.