COSine Science Fiction Convention

January 20-22, 2017

Colorado Springs, Colorado

COSine 2017 is pleased to annouce our Guest of Honor Jo Walton.

Magic Laser Man Jon Singer will be our Science Guest.

Joining us again this year are Special Guests Connie and Courtney Willis.

For the latest happenings, check here or our facebook page.

  • Our program guide is now online! Click Here for the complete schedule.

  • Pre-registration is closed, but you can still buy a membership at the convention itself. Both full weekend and day rates are available. Click here for the rates.

  • Our gaming schedule is now online here

Want to attend?

COSine has a membership fee that includes all activities and games, Dealer's Room, Author's Reception & Signing, and our renowned Con Suite with food and drinks you can enjoy all weekend.


COSine is proud to feature Jo Walton as our Guest of Honor for 2017. Our Science Guest is magic laser man Jon Singer. We are pleased to again welcome Connie and Courtney Willis as our Special Guests.


COSine 2017 will be returning to the same hotel we have used in the past, the Hotel Eleganté Conference & Event Center, located at the south end of Colorado Springs, just off I-25. The hotel has great function space for our convention, and the best view ever from the dealer's room!

Call for Volunteers!

Want to help out? We would love to have you! If you would like to lend a hand, contact the committee member in charge of any area you are interested in, or you can volunteer at the convention itself. You can come to meetings of First Friday Fandom to see how we organize the convention and share your opinions.