Yes, Manhattan Beach has the annual 10k race. It is a ton of fun and the whole community gets involved. The streets are lined with residents and the finish is always on the pier. It is usually on October 4th, and the race kicks off the Old Hometown Fair, in and around Live Oak Park. http://www.mb10k.com/
I have participated in this race numerous times as a kid, and I still go to enjoy the fair.