The third annual Southern New England Trunkline Trail Road Race will be held May 11 beginning at 431 Washington St. Race-day registration starts at 8 a.m.; the 5K run kicks off at 10 a.m. The entry fee is $20 prior to race day, $25 the day of the race, and $15 for students. Proceeds will go toward improvements to the recreational rail trail, which extends for 22 miles between Franklin and Douglas. For more information or to register, visit www.franklinbellinghamrailtrail.org. Full story for BostonGlobe.com subscribers.