Ugly holiday sweaters don't belong in the back of your closet—at least for this weekend 5K run, which is more about fun than setting a personal best. At every mile, you'll find holiday-themed aide stations, cups of steaming hot chocolate, and sledding hills (yes, you're encouraged to take a sledding break). Slide into the after party for awards like best sweater, ugliest sweater, and best mustache (real or fake, so the ladies aren't out of the running). Heads up: Registration ends Thursday. Sat 9 a.m.

Visit theuglysweaterrun.com.