COSine 2025

COLORADO SPRINGS SCIENCE FICTION CONVENTION

January 24-26, 2025

Guest of Honor
Lawrence WATT-EVANS
Award-winning Author; The Ethshar Series, Annals of the Chosen, and many more

Science Guest of Honor
Dr. KaChun Yu
Curator of Space Science
Denver Museum of Nature & Science

Artist Guest of Honor
Theresa Mather
Cryptopictographer

Special Guest
Connie Willis
Sci-Fi Grand Master

Special Guest
Courtney Willis
“Dr. Science”

COSine has been held in Colorado Springs since 2004, and features numerous sci-fi and fantasy authors, artists, and fans, as well as panels, art show, author signing & reception, gaming, science & technology, dealers room, kids’ programming, liquid nitrogen ice‑cream, and more!

Embassy Suites by Hilton Colorado Springs
7290 Commerce Center Drive, Colorado Springs, CO 80919
719-599-9100 map
Ask for the special COSine convention rate when reserving your room!

COSine is a production of First Friday Fandom!