The annual Trillium Trek Trail Run road race is set for Saturday, March 23, at Chicopee Woods. Runners can choose to compete in a half-marathon, 10-kilometer race, 5K run/walk or kids fun run amid the natural beauty of Chicopee’s forest, creeks and hills. Last day advance registration is from 10 a.m. to 7 p.m. March 22 at Runners Fit, 7419 Spout Springs Road in Flowery Branch.