The Gate River Run 15K hosted by JTC Running is March 11. This is the 40th year for the premier event, which starts and ends near Everbank Field. Registration is available online at www.gateriverrun15K.com through March 8. Runners can also choose the Florida Times-Union 5K for Charity or the Brooks Rehabilitation Challenge Mile. Younger runners, 13 and under, can compete in the Junior River Run and the even younger ones can take part in the Diaper Dash. The 15K course crosses two major bridges spanning the St. Johns River, which gave the race its name. It was originally called the Jacksonville River Run and was started in 1978 by the Jacksonville Track Club, now known as JTC Running. A post-race celebration will be held at the Jacksonville Fairgrounds.