Organizers expect a record field on Saturday for the annual Dam-to-Dam road race in Des Moines. The 20-K race has been the feature since the beginning and starts at the Saylorville Dam before finishing in downtown Des Moines.Kurt Schaffer who says the 20-K has become one of the most popular of its kind and the course is a major reason. He says a group or runners create the race to give them a quality race in their own area. The course is not typical because it is point-to-point, and doesn’t start and finish in the same spot. Schaffer says last year’s race attracted a record field and he expects that record to be topped this week. Last year was probably the hottest day in the 23 year history of the race, but he says this year it looks to be nicer weather.The event also includes a five-K.