Chicago City-O 2026

Chicago City-O 2026 is a participant-entry orienteering event scheduled for 2026-06-07 near Chicago, Illinois. You do not need to have an membership to register for individual club events. You can choose the "Enter Data Manually" option below and register for our event. Online registration will close at Midnight on Friday, June 5th. The start/finish will be at the REI store at 905 W Eastman. We will gather there for a mass start at 10:15am . There will be a 4 hour time limit to gather as many points as you can. You can go out for as long as you want up to the 4 hour limit. If you are going out as a group, only one person needs to register and you only pay one fee. While registering you will enter your team name, number of participants, team member names and have an opportunity to buy extra maps for them at only $3 each! This event will involve a sheet of questions - you answer a questio