Grab a costume and a pair of athletic shoes and run or walk through the Northbrook Park District’s Halloween-themed course at Techny Prairie Park and Fields, 1700 Techny Road. Starting at 5pm, October 23, the Halloween 3K Fun Run features a variety of activities, including a candy-count contest and costume contest, with prizes awarded for best costume, best group costume and other fun categories! Runners will be spaced out through multiple race start times at 5pm, 6pm and 7pm. Registration ends at 5pm on Friday, October 16 and no race-day registration will be available. Cost is $10 per person and $30 per family of four. Save your spot here.