We are excited to welcome you back to campus to reconnect with your classmates, fellow Techers and the Institute through class events, seminars, division receptions and tours, house reunions, and so much more.

While many activities are free, those marked with a $ carry a fee. Unless otherwise indicated, activities are open to all.

Thursday, May 16

Class Reunions for 1949, 1954, 1959, 1964, 1969


President’s Reception for Classes of ’49, ’54, ’59, ’64, ’69
President Thomas F. Rosenbaum and Professor Katherine T. Faber welcome members of the 50th – 70th reunion classes back to Caltech at this special reception to kick off your reunion weekend.
Tent, President’s House Lawn

Reunion Dinners for Classes of ’49, ’54, ’59, ’64, ’69
Class reunion photos
will be taken before reunion dinners. 
Athenaeum, 551 S. Hill Ave. / $

Friday, May 17

Class Reunions for 2014, 2009, 2004, 1999, 1994, 1989, 1984, 1979, and 1974

Continental Breakfast
Enjoy the company of your classmates and fellow alumni over an al fresco breakfast in the garden.
Alumni House, 345 S. Hill Ave. / $

Half Century Club Luncheon
The Half Century Club is a special group of Caltech undergraduate and graduate alumni who received their degrees 50 or more years ago. Join us to honor the Class of 1969 as its members join the Half Century Club on the occasion of their 50th Reunion.
Noon                  Check-in and refreshments
12:15 PM           Program and induction of the Class of 1969
12:30 PM          Lunch
Tent, Athenaeum Lawn, 551 S. Hill Ave.
$ alumni and guests, free for members of the classes of ’49, ’54, ’59, ’64, and ’69

Caltech Fund Cocktail Party
Reconnect with your fellow alumni and meet the Class of 2019. Enjoy delicious cocktails and appetizers, snap a photo in our fun photo booth and don’t miss out on your reunion class photo! Celebrating Caltech’s community of supporters, this reception is open to all.  
Class reunion photos will be taken during the party. 
Athenaeum Lawn, 551 S. Hill Ave. / Open to all

Reunion Dinners for the Classes of ’14, ’09, ’04, ’99, ’94, ’89, ’84, ’79, and ’74
Athenaeum, 551 S. Hill Ave. / $

Class of 1969 Buffet Dinner

Alumni House, 345 S. Hill Ave. / $

After Party @ Tom Mannion's
Join Tom Mannion and your fellow recent alumni (Classes of ’94 - ’18) and current seniors from the Class of 2019 for a late-night hangout with tasty bites and beverages. Memorialize the evening in our photo booth!
Tom Mannion's House, 400 S. Hill Ave.            

Saturday, May 18

8:30 AM - 5:30 PM
82nd Annual Seminar Day
Caltech is at the forefront of pushing frontiers and venturing into uncharted territory – resulting in revolutionary contributions to science and society. Hear from some of these radically inventive minds at this year’s Seminar Day when faculty from across all six divisions and JPL share their latest discoveries. With over 18 different seminars to choose from, Seminar Day offers our alumni and friends the opportunity to immerse themselves in a full day of life-long learning.
See our Seminar Day page for more information.
Caltech Campus

All Alumni Lunch
Join fellow alumni under the big tent for a boxed lunch or feel free to bring your own picnic and spread out a blanket on the lawn.
Beckman Mall, Tent / $

Graduate Student Poster Session
Graduate students from across all divisions will present research posters on their cutting-edge science. Sponsored by the Graduate Student Council.
Beckman Institute, Outside Courtyard

House Reunions
Avery, Fleming, Lloyd, and Page Houses.
Caltech Houses / $

Sunday, May 19

House Reunions
Blacker, Dabney, Ricketts, and Ruddock Houses.
Caltech Houses / $