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. Ka Chun Yu
Curator of Space Science
Denver Museum of Nature & Science
Artist Guest of Honor
Theresa Mather
Cryptopictographer
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!