You can buy horse racing programs on the web from several sites. These include Horse Racing Programs, USA; ASD, also known as Assiniboia Downs; and eBay.
Horse Racing Programs, USA features links to free race programs for American thoroughbred horse racing and harness racing tracks. It also has a link called "Useful Notes" which will give you extra details about the specific links. The links are in alphabetical order. Additionally, it provides the same information for horse racing programs in Canada, the United Kingdom and Ireland. The ASD site tells you where to buy their programs in the clubhouse or at off-track betting locations. It also gives the specific locations of the off-track betting locations. Finally, one go to eBay and search for horse racing programs available to purchase.