COSine 2026
COLORADO SPRINGS SCIENCE FICTION CONVENTION
January 23-25, 2026
Guest of Honor
Cory Doctorow
Science Fiction Author (Picks and Shovels, The Lost Cause, many others), Activist, Journalist
Science Guest of Honor
Josiah Seaman
Geneticist & Bioinformatician
Artist Guest of Honor
Michael Carroll
Illustrator, Painter, Writer, Teacher
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!