Christie Clinic Illinois Marathon will extend its registration deadline to midnight on Monday. With tax season right around the corner, the marathon registration deadline will be flexible to those last-minute runners. The openings are available for the marathon, marathon relay, 5K and 10K. The half marathon and I-Challenge Half will stay closed because they’ve reached the maximum capacity.

The Busey Illinois Your Run registration is the one race that will remain open until after Monday. Registration for this event, which kicks off at 2:30 on Saturday, April 30, is open through 2:00 p.m. on race day.

With the exception of the Youth Run, there is no race registration at the Health & Fitness Expo on Thursday, April 28 and Friday, April 29 at the ARC building on the University of Illinois Campus.

To register for the race by April 18, visit www.illinoismarathon.com and click on the registration tab on the homepage.